ID

VAR-201602-0004

CVE

CVE-2015-7547

TITLE

GNU glibc getaddrinfo () stack buffer overflow vulnerability

DESCRIPTION

Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module. GNU glibc is an open source C language compiler released under the LGPL license agreement. It is an implementation of the C library in the Linux operating system. There is a stack overflow vulnerability in the getaddrinfo function in glibc when processing a specific DNS response packet. An attacker can use the vulnerability to launch an attack on a Linux host or related devices by constructing a malicious DNS service or using a man-in-the-middle attack, which results in remote code execution and can be obtained. User terminal control. Relevant releases/architectures: RHEL 7-based RHEV-H - noarch RHEV Hypervisor for RHEL-6 - noarch 3. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Critical: glibc security and bug fix update Advisory ID: RHSA-2016:0176-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0176.html Issue date: 2016-02-16 CVE Names: CVE-2015-5229 CVE-2015-7547 ===================================================================== 1. Summary: Updated glibc packages that fix two security issues and two bugs are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Critical security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module. (CVE-2015-7547) It was discovered that the calloc implementation in glibc could return memory areas which contain non-zero bytes. This could result in unexpected application behavior such as hangs or crashes. (CVE-2015-5229) The CVE-2015-7547 issue was discovered by the Google Security Team and Red Hat. Red Hat would like to thank Jeff Layton for reporting the CVE-2015-5229 issue. This update also fixes the following bugs: * The existing implementation of the "free" function causes all memory pools beyond the first to return freed memory directly to the operating system as quickly as possible. This can result in performance degradation when the rate of free calls is very high. The first memory pool (the main pool) does provide a method to rate limit the returns via M_TRIM_THRESHOLD, but this method is not available to subsequent memory pools. With this update, the M_TRIM_THRESHOLD method is extended to apply to all memory pools, which improves performance for threads with very high amounts of free calls and limits the number of "madvise" system calls. The change also increases the total transient memory usage by processes because the trim threshold must be reached before memory can be freed. To return to the previous behavior, you can either set M_TRIM_THRESHOLD using the "mallopt" function, or set the MALLOC_TRIM_THRESHOLD environment variable to 0. (BZ#1298930) * On the little-endian variant of 64-bit IBM Power Systems (ppc64le), a bug in the dynamic loader could cause applications compiled with profiling enabled to fail to start with the error "monstartup: out of memory". The bug has been corrected and applications compiled for profiling now start correctly. (BZ#1298956) All glibc users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Package List: Red Hat Enterprise Linux Client (v. 7): Source: glibc-2.17-106.el7_2.4.src.rpm x86_64: glibc-2.17-106.el7_2.4.i686.rpm glibc-2.17-106.el7_2.4.x86_64.rpm glibc-common-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-devel-2.17-106.el7_2.4.i686.rpm glibc-devel-2.17-106.el7_2.4.x86_64.rpm glibc-headers-2.17-106.el7_2.4.x86_64.rpm glibc-utils-2.17-106.el7_2.4.x86_64.rpm nscd-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-static-2.17-106.el7_2.4.i686.rpm glibc-static-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: glibc-2.17-106.el7_2.4.src.rpm x86_64: glibc-2.17-106.el7_2.4.i686.rpm glibc-2.17-106.el7_2.4.x86_64.rpm glibc-common-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-devel-2.17-106.el7_2.4.i686.rpm glibc-devel-2.17-106.el7_2.4.x86_64.rpm glibc-headers-2.17-106.el7_2.4.x86_64.rpm glibc-utils-2.17-106.el7_2.4.x86_64.rpm nscd-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-static-2.17-106.el7_2.4.i686.rpm glibc-static-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: glibc-2.17-106.el7_2.4.src.rpm ppc64: glibc-2.17-106.el7_2.4.ppc.rpm glibc-2.17-106.el7_2.4.ppc64.rpm glibc-common-2.17-106.el7_2.4.ppc64.rpm glibc-debuginfo-2.17-106.el7_2.4.ppc.rpm glibc-debuginfo-2.17-106.el7_2.4.ppc64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc64.rpm glibc-devel-2.17-106.el7_2.4.ppc.rpm glibc-devel-2.17-106.el7_2.4.ppc64.rpm glibc-headers-2.17-106.el7_2.4.ppc64.rpm glibc-utils-2.17-106.el7_2.4.ppc64.rpm nscd-2.17-106.el7_2.4.ppc64.rpm ppc64le: glibc-2.17-106.el7_2.4.ppc64le.rpm glibc-common-2.17-106.el7_2.4.ppc64le.rpm glibc-debuginfo-2.17-106.el7_2.4.ppc64le.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc64le.rpm glibc-devel-2.17-106.el7_2.4.ppc64le.rpm glibc-headers-2.17-106.el7_2.4.ppc64le.rpm glibc-utils-2.17-106.el7_2.4.ppc64le.rpm nscd-2.17-106.el7_2.4.ppc64le.rpm s390x: glibc-2.17-106.el7_2.4.s390.rpm glibc-2.17-106.el7_2.4.s390x.rpm glibc-common-2.17-106.el7_2.4.s390x.rpm glibc-debuginfo-2.17-106.el7_2.4.s390.rpm glibc-debuginfo-2.17-106.el7_2.4.s390x.rpm glibc-debuginfo-common-2.17-106.el7_2.4.s390.rpm glibc-debuginfo-common-2.17-106.el7_2.4.s390x.rpm glibc-devel-2.17-106.el7_2.4.s390.rpm glibc-devel-2.17-106.el7_2.4.s390x.rpm glibc-headers-2.17-106.el7_2.4.s390x.rpm glibc-utils-2.17-106.el7_2.4.s390x.rpm nscd-2.17-106.el7_2.4.s390x.rpm x86_64: glibc-2.17-106.el7_2.4.i686.rpm glibc-2.17-106.el7_2.4.x86_64.rpm glibc-common-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-devel-2.17-106.el7_2.4.i686.rpm glibc-devel-2.17-106.el7_2.4.x86_64.rpm glibc-headers-2.17-106.el7_2.4.x86_64.rpm glibc-utils-2.17-106.el7_2.4.x86_64.rpm nscd-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: glibc-debuginfo-2.17-106.el7_2.4.ppc.rpm glibc-debuginfo-2.17-106.el7_2.4.ppc64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc64.rpm glibc-static-2.17-106.el7_2.4.ppc.rpm glibc-static-2.17-106.el7_2.4.ppc64.rpm ppc64le: glibc-debuginfo-2.17-106.el7_2.4.ppc64le.rpm glibc-debuginfo-common-2.17-106.el7_2.4.ppc64le.rpm glibc-static-2.17-106.el7_2.4.ppc64le.rpm s390x: glibc-debuginfo-2.17-106.el7_2.4.s390.rpm glibc-debuginfo-2.17-106.el7_2.4.s390x.rpm glibc-debuginfo-common-2.17-106.el7_2.4.s390.rpm glibc-debuginfo-common-2.17-106.el7_2.4.s390x.rpm glibc-static-2.17-106.el7_2.4.s390.rpm glibc-static-2.17-106.el7_2.4.s390x.rpm x86_64: glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-static-2.17-106.el7_2.4.i686.rpm glibc-static-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: glibc-2.17-106.el7_2.4.src.rpm x86_64: glibc-2.17-106.el7_2.4.i686.rpm glibc-2.17-106.el7_2.4.x86_64.rpm glibc-common-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-devel-2.17-106.el7_2.4.i686.rpm glibc-devel-2.17-106.el7_2.4.x86_64.rpm glibc-headers-2.17-106.el7_2.4.x86_64.rpm glibc-utils-2.17-106.el7_2.4.x86_64.rpm nscd-2.17-106.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: glibc-debuginfo-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-2.17-106.el7_2.4.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.4.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.4.x86_64.rpm glibc-static-2.17-106.el7_2.4.i686.rpm glibc-static-2.17-106.el7_2.4.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2015-5229 https://access.redhat.com/security/cve/CVE-2015-7547 https://access.redhat.com/security/updates/classification/#critical https://access.redhat.com/articles/2161461 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWw0iDXlSAg2UNWIIRAh1MAJ4i9uRE0pNTb+BjMHGTLL5PpEbF6gCgrBwA pR+M8a0yt5CoWGJfxcd7yVg= =gySF -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Note: the current version of the following document is available here: https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_n a-c04989404 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c04989404 Version: 1 HPSBGN03547 rev.1 - HPE Helion Eucalyptus Node Controller and other Helion Eucalyptus Components using glibc, Remote Arbitrary Code Execution NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2016-02-18 Last Updated: 2016-02-18 Potential Security Impact: Remote Arbitrary Code Execution Source: Hewlett Packard Enterprise, Product Security Response Team VULNERABILITY SUMMARY A security vulnerability in glibc has been addressed with HPE Helion Eucalyptus Node Controller and other Helion Eucalyptus components. The vulnerability could be exploited remotely resulting in arbitrary execution of code. - Helion Eucalyptus Node Controller (NC) components are confirmed to be affected by the vulnerability. Other Helion Eucalyptus components and pre-bundled service EMIs do not directly expose the vulnerability, but because glibc is a commonly used library on Linux, the exact exposure is hard to determine. Any software performing domain name resolution is potentially vulnerable. References: - CVE-2015-7547 - PSRT110035 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. - HPE Helion Eucalyptus 4.2.1 and earlier - HPE Helion Eucalyptus Service EMIs for Load Balancing and Imaging services package "eucalyptus-service-image-1.48-0.87.99" and earlier BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2015-7547 (AV:N/AC:H/Au:N/C:N/I:C/A:P) 6.1 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HPE has made the following software updates and workaround information available to resolve the vulnerability with glibc for HPE Helion Eucalyptus. + All hosts running HPE Helion Eucalyptus services should be upgraded to the latest glibc. Updated glibc packages are available for RHEL and CentOS: https://access.redhat.com/articles/2161461 **RHEL Note:** After following the guidelines for RHEL, a reboot is the safest and recommended way to ensure that updates takes effect for all services. + New Helion Eucalyptus Service EMIs will be made available soon in the Eucalyptus software repositories at: http://downloads.eucalyptus.com/software/eucalyptus/4.2/ **Note:** This security bulletin will be revised when those updates are available. Until Helion Eucalyptus EMI updates are available, the following workaround is available to update the instances launched from eucalyptus-service-image-1.48-0.87.99 and earlier to the latest glibc packages. **Workaround:** As a cloud administrator: 1) create an update-glibc script with the following content: #! /bin/bash yum update -y glibc 2) set the following cloud properties to use that script on instance start: euctl services.imaging.worker.init_script=@update-glibc euctl services.loadbalancing.worker.init_script=@update-glibc This script will be automatically executed for each of the new instances started from the service image. For instances that are already running, the cloud administrator will need to terminate them and start again for the script to take effect. More specifically, for the Load Balancing service, the cloud admin needs to find all instances running under the "(eucalyptus)loadbalancing" account: # euare-accountlist | grep loadbalancing (eucalyptus)loadbalancing <accnt_id> # euca-describe-instances verbose | grep <accnt_id> And terminate them using euca-terminate-instances. New updated instances will be started automatically after that. For the Imaging Service, the imaging worker needs to be terminated and started again: # esi-manage-stack -a delete imaging # esi-manage-stack -a create imaging HISTORY Version:1 (rev.1) - 17 February 2016 Initial release Third Party Security Patches: Third party security patches that are to be installed on systems running Hewlett Packard Enterprise (HPE) software products should be applied in accordance with the customer's patch management policy. Support: For issues about implementing the recommendations of this Security Bulletin, contact normal HPE Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hpe.com. Report: To report a potential security vulnerability with any HPE supported product, send Email to: security-alert@hpe.com Subscribe: To initiate a subscription to receive future HPE Security Bulletin alerts via Email: http://www.hpe.com/support/Subscriber_Choice Security Bulletin Archive: A list of recently released Security Bulletins is available here: http://www.hpe.com/support/Security_Bulletin_Archive Software Product Category: The Software Product Category is represented in the title by the two characters following HPSB. 3C = 3COM 3P = 3rd Party Software GN = HPE General Software HF = HPE Hardware and Firmware MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PV = ProCurve ST = Storage Software UX = HP-UX Copyright 2016 Hewlett Packard Enterprise Hewlett Packard Enterprise shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental,special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett Packard Enterprise and the names of Hewlett Packard Enterprise products referenced herein are trademarks of Hewlett Packard Enterprise in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. Weber, S. Cisco Small Business RV Series Routers offer virtual private networking (VPN) technology so your remote workers can connect to your network through a secure Internet pathway." Source: https://www.cisco.com/c/en/us/products/routers/small-business-rv-series-routers/index.html Business recommendation: ------------------------ We want to thank Cisco for the very quick and professional response and great coordination. Customers are urged to update the firmware of their devices. Vulnerability overview/description: ----------------------------------- 1) Hardcoded Credentials The device contains hardcoded users and passwords which can be used to login via SSH on an emulated device at least. During the communication with Cisco it turned out that: "Accounts like the 'debug-admin' and 'root' can not be accessed from console port, CLI or webui". Therefore, these accounts had no real functionality and cannot be used for malicious actions. The outdated version was found by IoT Inspector. The outdated version was found by IoT Inspector. 4) Multiple Vulnerabilities - IoT Inspector Report Further information can be found in IoT Inspector report: https://r.sec-consult.com/ciscoiot Proof of concept: ----------------- 1) Hardcoded Credentials The following hardcoded hashes were found in the 'shadow' file of the firmware: root:$1$hPNSjUZA$7eKqEpqVYltt9xJ6f0OGf0:15533:0:99999:7::: debug-admin:$1$.AAm0iJ4$na9wZwly9pSrdS8MhcGKw/:15541:0:99999:7::: [...] The undocumented user 'debug-admin' is also contained in this file. Starting the dropbear daemon as background process on emulated firmware: ------------------------------------------------------------------------------- # dropbear -E # [1109] <timestamp> Running in background # # [1112] <timestamp> Child connection from <IP>:52718 [1112] <timestamp> /var must be owned by user or root, and not writable by others [1112] <timestamp> Password auth succeeded for 'debug-admin' from <IP>:52718 ------------------------------------------------------------------------------- Log on via another host connected to the same network. For this PoC the password of the debug-admin was changed in the 'shadow' file. ------------------------------------------------------------------------------- [root@localhost medusa]# ssh debug-admin@<IP> /bin/ash -i debug-admin@<IP>'s password: /bin/ash: can't access tty; job control turned off BusyBox v1.23.2 (2018-11-21 18:22:56 IST) built-in shell (ash) /tmp $ ------------------------------------------------------------------------------- The 'debug-admin' user has the same privileges like 'root'. This can be determined from the corresponding sudoers file in the firmware: [...] ## User privilege specification ## root ALL=(ALL) ALL debug-admin ALL=(ALL) ALL ## Uncomment to allow members of group wheel to execute any command # %wheel ALL=(ALL) ALL [...] During the communication with Cisco it turned out that: "Accounts like the 'debug-admin' and 'root' can not be accessed from console port, CLI or webui". Therefore, these accounts had no real functionality and cannot be used for malicious actions. # python cve-2015-7547-poc.py & [1] 961 # chroot /medusa_rootfs/ bin/ash BusyBox v1.23.2 (2018-11-21 18:22:56 IST) built-in shell (ash) # gdb cve-2015-7547_glibc_getaddrinfo [...] [UDP] Total Data len recv 36 [UDP] Total Data len recv 36 Connected with 127.0.0.1:41782 [TCP] Total Data len recv 76 [TCP] Request1 len recv 36 [TCP] Request2 len recv 36 Cannot access memory at address 0x4 Program received signal SIGSEGV, Segmentation fault. ------------------------------------------------------------------------------- # ls "pressing <TAB>" test ]55;test.txt # ------------------------------------------------------------------------------- 4) Multiple Vulnerabilities - IoT Inspector Report Further information can be found in IoT Inspector report: https://r.sec-consult.com/ciscoiot The summary is below: IoT Inspector Vulnerability #1 BusyBox CVE entries Outdated BusyBox version is affected by 7 published CVEs. IoT Inspector Vulnerability #2 curl CVE entries Outdated curl version is affected by 35 published CVEs. IoT Inspector Vulnerability #9 Linux Kernel Privilege Escalation “pp_key” Outdated Linux Kernel version is affected by CVE-2015-7547. IoT Inspector Vulnerability #10 OpenSSL CVE entries Outdated OpenSSL version affected by 6 published CVEs. Clarification which of the reported issues will be fixed. The vendor added the RV160 and RV260 router series to be vulnerable to the same issues too. Solution: --------- Upgrade to the newest available firmware version. Additionally, the vendor provides the following security notice: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190904-sb-vpnrouter Workaround: ----------- None. Weber / @2019 . + 3PAR OS 3.2.1 MU5 and 3.2.2 MU2 - HPE recommends prior impacted versions update to 3PAR OS 3.2.1 MU 5 or 3.2.2 MU2. - glibc has been updated in these releases to resolve the glibc vulnerability. + 3PAR OS 3.1.3 is also vulnerable but will not be fixed. **Mitigation:** The best protection to guard against exploitation of this vulnerability is to securely configure and operate the storage array in accordance with the *HPE 3PAR Configuration Guidelines* documentation. SEC Consult Vulnerability Lab Security Advisory < 20210901-0 > ======================================================================= title: Multiple vulnerabilities product: see "Vulnerable / tested versions" vulnerable version: see "Vulnerable / tested versions" fixed version: see "Solution" CVE number: CVE-2021-39278, CVE-2021-39279 impact: High homepage: https://www.moxa.com/ found: 2020-08-31 by: T. Weber (Office Vienna) SEC Consult Vulnerability Lab An integrated part of SEC Consult, an Atos company Europe | Asia | North America https://www.sec-consult.com ======================================================================= Vendor description: ------------------- "Together, We Create Change Moxa is committed to making a positive impact around the world. We put our all behind this commitment--from our employees, to our products and supply chain. In our local communities, we nurture and support the spirit of volunteering. We encourage our employees to contribute to community development, with an emphasis on ecology, education, and health. In our products, we invest in social awareness programs and environment-friendly policies at every stage of the product lifecycle. We make sure our manufacturing meets the highest standards with regards to quality, ethics, and sustainability." Source: https://www.moxa.com/en/about-us/corporate-responsibility Business recommendation: ------------------------ SEC Consult recommends to immediately apply the available patches from the vendor. A thorough security review should be performed by security professionals to identify further potential security issues. Vulnerability overview/description: ----------------------------------- 1) Authenticated Command Injection (CVE-2021-39279) An authenticated command injection vulnerability can be triggered by issuing a GET request to the "/forms/web_importTFTP" CGI program which is available on the web interface. An attacker can abuse this vulnerability to compromise the operating system of the device. This issue was found by emulating the firmware of the device. 2) Reflected Cross-Site Scripting via Manipulated Config-File (CVE-2021-39278) Via a crafted config-file, a reflected cross-site scripting vulnerability can be exploited in the context of the victim's browser. This config-file can be uploaded to the device via the "Config Import Export" tab in the main menu. 3) Known GNU glibc Vulnerabilities (CVE-2015-0235) The used GNU glibc in version 2.9 is outdated and contains multiple known vulnerabilities. One of the discovered vulnerabilities (CVE-2015-0235, gethostbyname "GHOST" buffer overflow) was verified by using the MEDUSA scalable firmware runtime. 4) Multiple Outdated Software Components Multiple outdated software components containing vulnerabilities were found by the IoT Inspector. The vulnerabilities 1), 2) and 3) were manually verified on an emulated device by using the MEDUSA scalable firmware runtime. Proof of concept: ----------------- 1) Authenticated Command Injection (CVE-2021-39279) The vulnerability can be triggered by navigating in the web interface to the tab: "Main Menu"->"Maintenance"->"Config Import Export" The "TFTP Import" menu is prone to command injection via all parameters. To exploit the vulnerability, an IP address, a configuration path and a filename must be set. If the filename is used to trigger the exploit, the payload in the interceptor proxy would be: http://192.168.1.1/forms/web_importTFTP?servIP=192.168.1.1&configPath=/&fileName=name|`ping localhost -c 100` 2) Reflected Cross-Site Scripting via Manipulated Config-File (CVE-2021-39278) The vulnerability can be triggered by navigating in the web interface to the tab: "Main Menu"->"Maintenance"->"Config Import Export" The "Config Import" menu is prone to reflected cross-site scripting via the upload of config files. Example of malicious config file: ------------------------------------------------------------------------------- [board] deviceName="WAC-2004_0000</span><script>alert(document.cookie)</script>" deviceLocation="" [..] ------------------------------------------------------------------------------- Uploading such a crafted file triggers cross-site scripting as the erroneous value is displayed without filtering characters. 3) Known GNU glibc Vulnerabilities (CVE-2015-0235) GNU glibc version 2.9 contains multiple CVEs like: CVE-2016-1234, CVE-2015-7547, CVE-2013-7423, CVE-2013-1914, and more. The gethostbyname buffer overflow vulnerability (GHOST) was checked with the help of the exploit code from https://seclists.org/oss-sec/2015/q1/274. It was compiled and executed on the emulated device to test the system. 4) Multiple Outdated Software Components The IoT Inspector recognized multiple outdated software components with known vulnerabilities: BusyBox 1.18.5 06/2011 Dropbear SSH 2011.54 11/2011 GNU glibc 2.9 02/2009 Linux Kernel 2.6.27 10/2008 OpenSSL 0.9.7g 04/2005 Only found in the program "iw_director" OpenSSL 1.0.0 03/2010 Vulnerable / tested versions: ----------------------------- The following firmware versions for various devices have been identified to be vulnerable: * WAC-2004 / 1.7 * WAC-1001 / 2.1 * WAC-1001-T / 2.1 * OnCell G3470A-LTE-EU / 1.7 * OnCell G3470A-LTE-EU-T / 1.7 * TAP-323-EU-CT-T / 1.3 * TAP-323-US-CT-T / 1.3 * TAP-323-JP-CT-T / 1.3 * WDR-3124A-EU / 2.3 * WDR-3124A-EU-T / 2.3 * WDR-3124A-US / 2.3 * WDR-3124A-US-T / 2.3 Vendor contact timeline: ------------------------ 2020-10-09: Contacting vendor through moxa.csrt@moxa.com. 2020-10-12: Contact sends PGP key for encrypted communication and asks for the detailed advisory. Sent encrypted advisory to vendor. 2020-11-06: Status update from vendor regarding technical analysis. Vendor requested more time for fixing the vulnerabilities as more products are affected. 2020-11-09: Granted more time for fixing to vendor. 2020-11-10: Vendor asked for next steps regarding the advisory publication. 2020-11-11: Asked vendor for an estimation when a public disclosure is possible. 2020-11-16: Vendor responded that the product team can give a rough feedback. 2020-11-25: Asked for a status update. 2020-11-25: Vendor responded that the investigation is not done yet. 2020-12-14: Vendor provided a list of potential affected devices and stated that full investigation may take until January 2021 due to the list of CVEs that were provided with the appended IoT Inspector report. The patches may be available until June 2021. 2020-12-15: Shifted next status update round with vendor on May 2021. 2020-12-23: Vendor provided full list of affected devices. 2021-02-05: Vendor sieved out the found issues from 4) manually and provided a full list of confirmed vulnerabilities. WAC-2004 phased-out in 2019. 2021-02-21: Confirmed receive of vulnerabilities, next status update in May 2021. 2021-06-10: Asking for an update. 2021-06-15: Vendor stated, that the update will be provided in the next days. 2021-06-21: Vendor will give an update in the next week as Covid gets worse in Taiwan. 2021-06-23: Vendor stated, that patches are under development. Vendor needs more time to finish the patches. 2021-06-24: Set release date to 2021-09-01. 2021-07-02: Vendor provides status updates. 2021-08-16: Vendor provides status updates. 2021-08-17: Vendor asks for CVE IDs and stated, that WDR-3124A has phased-out. 2021-08-20: Sent assigned CVE-IDs to vendor. Asked for fixed version numbers. 2021-08-31: Vendor provides fixed firmware version numbers and the advisory links. 2021-09-01: Coordinated release of security advisory. Solution: --------- According to the vendor the following patches must be applied to fix issues: * WAC-1001 / 2.1.5 * WAC-1001-T / 2.1.5 * OnCell G3470A-LTE-EU / 1.7.4 * OnCell G3470A-LTE-EU-T / 1.7.4 * TAP-323-EU-CT-T / 1.8.1 * TAP-323-US-CT-T / 1.8.1 * TAP-323-JP-CT-T / 1.8.1 The Moxa Technical Support must be contacted for requesting the security patches. The corresponding security advisories for the affected devices are available on the vendor's website: TAP-323/WAC-1001/WAC-2004 https://www.moxa.com/en/support/product-support/security-advisory/tap-323-wac-1001-2004-wireless-ap-bridge-client-vulnerabilities OnCell G3470A-LTE/WDR-3124A https://www.moxa.com/en/support/product-support/security-advisory/oncell-g3470a-wdr-3124a-cellular-gateways-router-vulnerabilities The following device models are EOL and should be replaced: * WAC-2004 * WDR-3124A-EU * WDR-3124A-EU-T * WDR-3124A-US * WDR-3124A-US-T Workaround: ----------- None. Advisory URL: ------------- https://sec-consult.com/vulnerability-lab/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult, an Atos company Europe | Asia | North America About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult, an Atos company. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://sec-consult.com/career/ Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://sec-consult.com/contact/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF Thomas Weber / @2021

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

buffer error

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

T. Weber

SOURCES

LAST UPDATE DATE

2025-10-04T21:57:36.360000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE