Debian DLA-266-1 : libxml2 security update

medium Nessus Plugin ID 84508
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Debian host is missing a security update.

Description

This upload to Debian squeeze-lts fixes three issues found in the libxml2 package.

(1) CVE-2015-1819 / #782782

Florian Weimer from Red Hat reported an issue against libxml2, where a parser which uses libxml2 chokes on a crafted XML document, allocating gigabytes of data. This is a fine line issue between API misuse and a bug in libxml2. This issue got addressed in libxml2 upstream and the patch has been backported to libxml2 in squeeze-lts.

(2) #782985

Jun Kokatsu reported an out-of-bounds memory access in libxml2. By entering an unclosed html comment the libxml2 parser didn't stop parsing at the end of the buffer, causing random memory to be included in the parsed comment that was returned to the evoking application.

In the Shopify application (where this issue was originally discovered), this caused ruby objects from previous http requests to be disclosed in the rendered page.

(3) #783010

Michal Zalewski reported another out-of-bound reads issue in libxml2 that did not cause any crashes but could be detected under ASAN and Valgrind.

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

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2015/07/msg00004.html

https://packages.debian.org/source/squeeze-lts/libxml2

Plugin Details

Severity: Medium

ID: 84508

File Name: debian_DLA-266.nasl

Version: 2.8

Type: local

Agent: unix

Published: 7/6/2015

Updated: 1/11/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libxml2, p-cpe:/a:debian:debian_linux:libxml2-dbg, p-cpe:/a:debian:debian_linux:libxml2-dev, p-cpe:/a:debian:debian_linux:libxml2-doc, p-cpe:/a:debian:debian_linux:libxml2-utils, p-cpe:/a:debian:debian_linux:python-libxml2, p-cpe:/a:debian:debian_linux:python-libxml2-dbg, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/3/2015

Reference Information

CVE: CVE-2015-1819

BID: 75570