GLSA-200512-01 : Perl: Format string errors can lead to code execution

Medium Nessus Plugin ID 20280


The remote Gentoo host is missing one or more security-related patches.


The remote host is affected by the vulnerability described in GLSA-200512-01 (Perl: Format string errors can lead to code execution)

Jack Louis discovered a new way to exploit format string errors in Perl that could lead to the execution of arbitrary code. This is perfomed by causing an integer wrap overflow in the efix variable inside the function Perl_sv_vcatpvfn. The proposed fix closes that specific exploitation vector to mitigate the risk of format string programming errors in Perl. This fix does not remove the need to fix such errors in Perl code.
Impact :

Perl applications making improper use of printf functions (or derived functions) using untrusted data may be vulnerable to the already-known forms of Perl format string exploits and also to the execution of arbitrary code.
Workaround :

Fix all misbehaving Perl applications so that they make proper use of the printf and derived Perl functions.


All Perl users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose dev-lang/perl

See Also

Plugin Details

Severity: Medium

ID: 20280

File Name: gentoo_GLSA-200512-01.nasl

Version: $Revision: 1.13 $

Type: local

Published: 2005/12/08

Modified: 2015/04/13

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:perl, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 2005/12/07

Vulnerability Publication Date: 2005/12/01

Reference Information

CVE: CVE-2005-3962

OSVDB: 21345, 22255

GLSA: 200512-01