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CVE Database

CVE-2012-3405

Impact: Moderate
Public: 2012-07-11
Bugzilla: 833704: CVE-2012-3405 glibc: incorrect use of extend_alloca() in formatted printing can lead to FORTIFY_SOURCE format string protection bypass

Details

The MITRE CVE dictionary describes this issue as:

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 and other versions does not properly calculate a buffer length, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (segmentation fault and crash) via a format string with a large number of format specifiers that triggers "desynchronization within the buffer size handling," a different vulnerability than CVE-2012-3404.

Find out more about CVE-2012-3405 from the MITRE CVE dictionary and NIST NVD.

Statement

This issue did not affect the version of glibc as shipped with Red Hat Enterprise Linux 5.

CVSS v2 metrics

Base Score: 6.8
Base Metrics: AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector: Network
Access Complexity: Medium
Authentication: None
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
RHEV Hypervisor for RHEL-6 (rhev-hypervisor6) RHSA-2012:1200 August 23, 2012
Red Hat Enterprise Linux version 6 (glibc) RHSA-2012:1098 July 18, 2012

External References

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.