ID

VAR-201409-0366

CVE

CVE-2014-6277

TITLE

GNU Bash shell executes commands in exported functions in environment variables

DESCRIPTION

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access, and untrusted-pointer read and write operations) via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271 and CVE-2014-7169. GNU Bash 4.3 and earlier contains a command injection vulnerability that may allow remote code execution. This vulnerability CVE-2014-6271 and CVE-2014-7169 Vulnerability due to insufficient fix for.Arbitrary code execution or denial of service by a third party through a crafted environment ( Uninitialized memory access and untrusted pointer read and write operations ) There is a possibility of being put into a state. An attacker can exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition. NOTE: This vulnerability can only be exploited if the attacker already has valid administrative login credentials. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Note: the current version of the following document is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/ docDisplay?docId=emr_na-c04558068 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c04558068 Version: 1 HPSBMU03246 rev.1 - HP Insight Control for Linux Central Management Server Pre-boot Execution Environment running Bash Shell, Multiple Vulnerabilities NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2015-02-02 Last Updated: 2015-02-02 Potential Security Impact: Multiple vulnerabilities Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified with HP Insight Control for Linux Central Management Server Pre-boot Execution Environment that could be exploited remotely resulting in Denial of Service (DoS), disclosure of information, and other vulnerabilities. References: CVE-2014-6271 CVE-2014-6277 CVE-2014-6278 CVE-2014-7169 CVE-2014-7186 CVE-2014-7187 CVE-2014-7196 SSRT101742 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP Insight Control for Linux Central Management Server Pre-boot Execution Environment running Bash Shell BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2014-6271 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-6277 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-6278 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-7169 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-7186 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-7187 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-7196 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided the following instructions to resolve these vulnerabilities. Follow these steps to update the HP Insight Control for Linux Central Management Server Pre-boot Execution Environment: NOTE: The following procedure updates the bash shell on the Linux Pre-boot Execution Environment. Please update the Bash shell version on the HP Insight Control for Linux Central Management Server also. 1. On the Production RHEL 6.2 OS: a. Prepare temporary directory for Bash update software: # mkdir -p $HOME/tmp/bash # cd $HOME/tmp/bash # pwd <home directory>/tmp/bash b. Download the file 'bash-4.1.2-15.el6_4.2.i686.rpm' for Insight Control for Linux Red Hat 6.2 i386 from https://rhn.redhat.com/errata/RHSA-2014-1311.html to the temporary directory '$HOME/tmp/bash'. c. Extract the Bash update software package. # rpm2cpio bash-4.1.2-15.el6_4.2.i686.rpm| cpio -idmv d. Verify the version of the Bash update software: # ./bin/bash --version GNU bash, version 4.1.2(1)-release (i686-redhat-linux-gnu) e. Verify version dependencies: # ldd ./bin/bash linux-gate.so.1 => (0x008a7000) libtinfo.so.5 => /lib/libtinfo.so.5 (0x00459000) libdl.so.2 => /lib/libdl.so.2 (0x002c0000) libc.so.6 => /lib/libc.so.6 (0x0012e000) /lib/ld-linux.so.2 (0x00108000) f. Create archive file from '/lib' to copy and install on the Insight Control for Linux Central Management Server Pre-boot Execution Environment system: # mkdir $HOME/tmp/lib # cd /lib # cp * $HOME/tmp/lib # cd $HOME/tmp # pwd <home directory>/tmp # tar cvf bash_lib.tar * 2. Download the new archive file '$HOME/tmp/bash_lib.tar' from the Production RHEL 6.2 OS system to the Insight Control for Linux Central Management Server Pre-boot Execution Environment system. 3. On the HP Insight Control for Linux Central Managment Server Pre-boot Execution Environment system: a. Create a temporary folder for the toolkit and copy the toolkit there : # mkdir -p $HOME/tmp/temp-toolkit # cp /usr/share/systemimager/boot/i386/standard/toolkit.tar.gz $HOME/tmp/temp-toolkit b. Extract the file 'toolkit.tar.gz' into the temporary folder: # cd $HOME/tmp/temp-toolkit # tar zxvf toolkit.tar.gz # mv $HOME/tmp/temp-toolkit/toolkit.tar.gz /tmp c. Verify the version of the toolkit Bash: # $HOME/tmp/temp-toolkit/bin/bash --version GNU bash, version 3.2.0(1)-release (i386-pc-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. d. Verify dependencies versions: # ldd $HOME/tmp/temp-toolkit/bin/bash linux-gate.so.1 => (0xffffe000) libtermcap.so.2 => /lib/libtermcap.so.2 (0xf7f8c000) libdl.so.2 => /lib/libdl.so.2 (0x008bf000) libc.so.6 => /lib/libc.so.6 (0x00777000) /lib/ld-linux.so.2 (0x00755000) e. Extract the archive 'bash_lib.tar' to directory '$HOME/tmp/bash_lib' . Then copy the bash binary and the library files to their respective locations: # tar xvf $HOME/tmp/bash_lib # cp $HOME/tmp/bash_lib/bash/bash $HOME/tmp/temp-toolkit/bin # cp $HOME/tmp/bash_lib/lib/* $HOME/tmp/temp-toolkit/lib f. Create the updated toolkit gzipped archive file and place in /usr/share/systemimager/boot/i386/standard # tar czvf toolkit.tar.gz * # cp toolkit.tar.gz /usr/share/systemimager/boot/i386/standard HISTORY Version:1 (rev.1) - 2 February 2015 Initial release Third Party Security Patches: Third party security patches that are to be installed on systems running HP 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 HP Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hp.com. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com Subscribe: To initiate a subscription to receive future HP Security Bulletin alerts via Email: http://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins Security Bulletin Archive: A list of recently released Security Bulletins is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/ 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 = HP General Software HF = HP Hardware and Firmware MP = MPE/iX MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PI = Printing and Imaging PV = ProCurve ST = Storage Software TU = Tru64 UNIX UX = HP-UX Copyright 2015 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company 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 Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iEYEARECAAYFAlTP2EgACgkQ4B86/C0qfVnMkQCg8yH4xRTp9ahC3s4vDiCBmKiV JTwAoPl3SC09DPRWwo1zluDWFF1OfMtA =w7+V -----END PGP SIGNATURE----- . This bulletin will be revised when the updates are available. MITIGATION INFORMATION HP recommends the following steps to reduce the risk of this vulnerability: - The "ssh" or "telnet" features may be disabled by the admin user. All MDS and Nexus 5K switches can function in this configuration. Access is available through the console port. HP StoreEver ESL E-series Tape Library - Disable DHCP and only use static IP addressing. HP Virtual Library System (VLS) - Disable DHCP and only use static IP addressing. Open the PXE Configuration Utility on the HP Insight Control server deployment window Select Linux Managed from the Boot Menu options Click the Edit button. Clicking the Edit button displays the Edit Shared Menu Option window Uncheck the x86 option in Operating System and Processor Options and click OK. This vulnerability allows users that have been granted access to a shell script to escalate privilege and execute unrestricted commands at the same security level as the Bash script. cachetoken NOTE: HP strongly recommends implementing the following security best practices to help reduce both known and future security vulnerability risks: Isolate the HP Integrity Server's management network by keeping it separate from the data or production network, and not connecting it directly to the Internet without additional access authentication. Patch and maintain Lightweight Directory Access Protocol (LDAP) and web servers. Use virus scanners, intrusion detection/prevention systems (IDS/IPS), and vulnerability scanners regularly. Apply all recommended HP Firmware updates

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

operating system commend injection

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

HP

SOURCES

LAST UPDATE DATE

2025-12-20T22:51:03.164000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE