Amazon Linux AMI : expat (ALAS-2012-89)

medium Nessus Plugin ID 69696
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Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

A denial of service flaw was found in the implementation of hash arrays in Expat. An attacker could use this flaw to make an application using Expat consume an excessive amount of CPU time by providing a specially crafted XML file that triggers multiple hash function collisions. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-0876)

A memory leak flaw was found in Expat. If an XML file processed by an application linked against Expat triggered a memory re-allocation failure, Expat failed to free the previously allocated memory. This could cause the application to exit unexpectedly or crash when all available memory is exhausted. (CVE-2012-1148)

Solution

Run 'yum update expat' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2012-89.html

Plugin Details

Severity: Medium

ID: 69696

File Name: ala_ALAS-2012-89.nasl

Version: 1.6

Type: local

Agent: unix

Published: 9/4/2013

Updated: 4/18/2018

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:expat, p-cpe:/a:amazon:linux:expat-debuginfo, p-cpe:/a:amazon:linux:expat-devel, cpe:/o:amazon:linux

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

Patch Publication Date: 6/19/2012

Reference Information

CVE: CVE-2012-0876, CVE-2012-1148

ALAS: 2012-89

RHSA: 2012:0731