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. 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. HP Vertica AMI's and Virtual Machines prior to v7.1.1-0. BACKGROUND HP Vertica AMI's and Virtual Machines prior to v7.1.1-0 include a vulnerable version of the Bash shell. HP has released the following updates to resolve this vulnerability for HP Vertica products. Update to the latest VM image available at: https://my.vertica.com For customers using the AMI version HP Vertica Analytics platform, please install the latest image available at Amazon. Under Step2: your ITRC operating systems - verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page: Subscriber's choice for Business: sign-in. On the web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." Copyright 2014 Hewlett-Packard Development Company, L.P. -----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-c04487573 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c04487573 Version: 1 HPSBST03155 rev.1 - HP StoreFabric H-series switches running Bash Shell, Remote Code Execution NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2014-11-11 Last Updated: 2014-11-11 Potential Security Impact: Remote code execution Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY A potential security vulnerability has been identified with HP StoreFabric H-series switches running Bash Shell. References: CVE-2014-6271 CVE-2014-6277 CVE-2014-6278 CVE-2014-7169 CVE-2014-7186 CVE-2014-7187 SSRT101747 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. All HP StoreFabric H-series switches 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 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP is actively working on a firmware update to resolve the vulnerability in HP StoreFabric H-series switches. This bulletin will be revised when the update is available. MITIGATION INFORMATION HP recommends the following steps to reduce the risk of this vulnerability: - Place the HP StoreFabric H-series switch and other data center critical infrastructure behind a firewall to disallow access from the Internet. - Change all HP StoreFabric switch default account passwords, including the root passwords, from the default factory passwords. - Examine the list of accounts, including ones on the switch and those existing on remote authentication servers such as RADIUS, LDAP, and TACAS+, to ensure only necessary personnel can gain access to HP StoreFabric H-series switches. Delete guest accounts and temporary accounts created for one-time usage needs. - To avoid possible exploit through the embedded web GUI, QuickTools, disable the web server with the following procedure: NOTE: After completing this procedure, the user will not be able to manage the switch using QuickTools. 1. Login to the Command Line Interface (CLI). 2. Execute the "admin start" command to enter into an admin session. 3. Execute the "set setup services" command and change setting for EmbeddedGUIEnabled to "False". HISTORY Version:1 (rev.1) - 11 November 2014 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 2014 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 v2.0.19 (GNU/Linux) iEYEARECAAYFAlRih1AACgkQ4B86/C0qfVkTcACgxGfOP4MElysfECAvNJSqkgk2 LCAAn0YGgpGgh493pj4rgB8hPH0PETxo =X8Sm -----END PGP SIGNATURE----- . 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. NOTE: This vulnerability can only be exploited if the attacker already has valid administrative login credentials. 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. Customers who need to upgrade the firmware of their Superdome X or HP Converged System 900 for SAP HANA should contact HP Technical Support to obtain the firmware or plan to schedule an onsite visit with an HP Services field service professional. Patch and maintain Lightweight Directory Access Protocol (LDAP) and web servers. Use virus scanners, intrusion detection/prevention systems (IDS/IPS), and vulnerability scanners regularly. No other firmware stream updates are planned beyond the NX-OS 5.x and 6.x versions listed below for the MDS products. This software versions 6.2(9a) has included the fixes for the vulnerability in HP StoreFabric C-series MDS switches which currently supporting NX-OS 6.X releases. This software version 5.2(8e) has included the fix for the vulnerability in HP C-series MDS switches which currently supporting NX-OS 5.X releases. All MDS and Nexus 5K switches can function in this configuration. Access is available through the console port

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

network

TYPE

Design Error

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

HP

SOURCES

LAST UPDATE DATE

2025-10-18T20:56:34.547000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE