RHEL 5 / 6 : libxml2 (RHSA-2012:0324)

critical Nessus Plugin ID 58086

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Synopsis

The remote Red Hat host is missing a security update for libxml2.

Description

The remote Redhat Enterprise Linux 5 / 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2012:0324 advisory.

The libxml2 library is a development toolbox providing the implementation of various XML standards.

It was found that the hashing routine used by libxml2 arrays was susceptible to predictable hash collisions. Sending a specially-crafted message to an XML service could result in longer processing time, which could lead to a denial of service. To mitigate this issue, randomization has been added to the hashing function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-0841)

All users of libxml2 are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The desktop must be restarted (log out, then log back in) for this update to take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL libxml2 package based on the guidance in RHSA-2012:0324.

Plugin Details

Severity: Critical

ID: 58086

File Name: redhat-RHSA-2012-0324.nasl

Version: 1.33

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 2/22/2012

Updated: 11/4/2024

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2012-0841

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:libxml2-static, p-cpe:/a:redhat:enterprise_linux:libxml2-devel, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:libxml2, p-cpe:/a:redhat:enterprise_linux:libxml2-python

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/21/2012

Vulnerability Publication Date: 12/21/2012

Reference Information

CVE: CVE-2012-0841

CWE: 407

RHSA: 2012:0324

Detections

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