Gentoo: GLSA 201612-25 Normal: CrackLib Buffer Overflow Advisory
gentoo
December 8, 2016
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.
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
style>.gentoo_availability{display:block;}
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.
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Severity: Normal
Title: CrackLib: Buffer overflow
Date: December 08, 2016
Bugs: #591456
ID: 201612-25
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.
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