Bug 833704 - (CVE-2012-3405) CVE-2012-3405 glibc: incorrect use of extend_alloca() in formatted printing can lead to FORTIFY_SOURCE format string protection bypass
CVE-2012-3405 glibc: incorrect use of extend_alloca() in formatted printing c...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20120711,repor...
: Security
Depends On: 841318
Blocks: 822803
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Reported: 2012-06-20 03:29 EDT by Stefan Cornelius
Modified: 2016-02-04 01:46 EST (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2012-07-18 12:38:54 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Stefan Cornelius 2012-06-20 03:29:48 EDT
It was discovered that the formatted printing functionality in glibc used extend_alloca() incorrectly. A remote attacker could provide a specially crafted sequence of format specifiers, leading to a desynchronization within the buffer size handling, resulting in the use of uninitialized memory or, potentially, FORTIFY_SOURCE format string protection mechanism bypass, when processed.

References:
http://sourceware.org/bugzilla/show_bug.cgi?id=13446
http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=a4647e727a2a52e1259474c13f4b13288938bed4
Comment 1 Stefan Cornelius 2012-07-11 06:35:07 EDT
Pulic now/CVEs requested via:
http://www.openwall.com/lists/oss-security/2012/07/11/5
Comment 2 Stefan Cornelius 2012-07-11 13:25:57 EDT
A CVE identifier of CVE-2012-3405 has been assigned to this issue.
Comment 3 errata-xmlrpc 2012-07-18 11:24:05 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:1098 https://rhn.redhat.com/errata/RHSA-2012-1098.html
Comment 4 Vincent Danen 2012-07-18 12:38:54 EDT
Statement:

This issue did not affect the version of glibc as shipped with Red Hat Enterprise Linux 5.
Comment 5 Vincent Danen 2012-07-18 12:39:58 EDT
Created glibc tracking bugs for this issue

Affects: fedora-all [bug 841318]
Comment 6 errata-xmlrpc 2012-08-23 10:25:39 EDT
This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2012:1200 https://rhn.redhat.com/errata/RHSA-2012-1200.html

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