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Access Restriction Bypass Affecting glibc package, versions <2.19-14

Severity

 Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    0.32% (72nd percentile)

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  • Snyk ID SNYK-DEBIAN11-GLIBC-525831
  • published 10 Feb 2014
  • disclosed 10 Feb 2014
Report a new vulnerability Found a mistake?

Introduced: 10 Feb 2014

CVE-2012-3406 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade Debian:11 glibc to version 2.19-14 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not "properly restrict the use of" the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.

CVSS Scores

version 3.1
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NVD

6.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low
Expand this section

Red Hat

6.3 medium