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Gentoo: GLSA 201612-25 Normal: CrackLib Buffer Overflow Advisory

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Calendar Grey December 8, 2016
Scroller Gentoo
Gentoo GLSA 202303-12 outlines a moderate severity vulnerability in Nginx that can result in denial of service.
A vulnerability in CrackLib could lead to the execution of arbitrary code.

Summary

A stack-based buffer overflow was discovered in the FascistGecosUser function of lib/fascist.c.

Topics%20covered

Topics Covered

security advisory gentoo buffer overflow arbitrary code execution normal severity

Resolution

All CrackLib users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-libs/cracklib-2.9.6-r1"

References

[ 1 ] CVE-2016-6318 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6318

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201612-25
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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: CrackLib: Buffer overflow
Date: December 08, 2016
Bugs: #591456
ID: 201612-25

Topics%20covered

Topics Covered

security advisory gentoo buffer overflow arbitrary code execution normal severity

Synopsis

A vulnerability in CrackLib could lead to the execution of arbitrary code.

Background

CrackLib is a library used to enforce strong passwords by comparing user selected passwords to words in chosen word lists.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-libs/cracklib < 2.9.6-r1 >= 2.9.6-r1

Impact

===== A local attacker could set a specially crafted GECOS field value in "/etc/passwd"; possibly resulting in the execution of arbitrary code with the privileges of the process, a Denial of Service condition, or the escalation of privileges.

Workaround

There is no known workaround at this time.