Fedora 15 : expat-2.1.0-1.fc15 (2012-6996)

Medium Nessus Plugin ID 59101


The remote Fedora host is missing a security update.


This update includes expat 2.1.0, which fixes includes a fix for a security issue.

A specially crafted set of keys could trigger hash function collisions, which degrade dictionary performance by changing hash table operations complexity from an expected/average O(1) to the worst case O(n). Reporters were able to find colliding strings efficiently using meet in the middle attack. (CVE-2012-0876)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected expat package.

See Also



Plugin Details

Severity: Medium

ID: 59101

File Name: fedora_2012-6996.nasl

Version: $Revision: 1.11 $

Type: local

Agent: unix

Published: 2012/05/16

Modified: 2015/10/20

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.3

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:expat, cpe:/o:fedoraproject:fedora:15

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2012/05/01

Reference Information

BID: 52379

FEDORA: 2012-6996