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Gentoo: GLSA-201612-39 Normal: Bash Arbitrary Code Execution

gentoo
Calendar Grey December 13, 2016
Dist Gentoo Esm H88
Gentoo Linux Security Bulletin GLSA 202301-14 discusses a critical OpenSSL flaw potentially enabling unauthorized access to sensitive data.
A vulnerability in Bash could potentially lead to arbitrary code execution.

Summary

A vulnerability was found in the way Bash expands $HOSTNAME. Injecting malicious code into $HOSTNAME could cause it to run each time Bash expands \h in the prompt string.

Topics%20covered

Topics Covered

security advisory gentoo code execution normal bash

Resolution

All Bash users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-4.3_p46-r1"

References

[ 1 ] CVE-2016-0634 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-0634

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201612-39
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Bash: Arbitrary code execution
Date: December 13, 2016
Bugs: #594496
ID: 201612-39

Topics%20covered

Topics Covered

security advisory gentoo code execution normal bash

Synopsis

A vulnerability in Bash could potentially lead to arbitrary code execution.

Background

Bash is the standard GNU Bourne Again SHell.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-shells/bash < 4.3_p46-r1 >= 4.3_p46-r1

Impact

===== A remote attacker controlling the system's hostname (i.e. via DHCP) could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

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