SB2012061904 - Amazon Linux AMI update for expat

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Main Vulnerability Database SB2012061904

SB2012061904 - Amazon Linux AMI update for expat

Published: June 19, 2012

Security Bulletin ID SB2012061904
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Resource management error (CVE-ID: CVE-2012-0876)

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The XML parser (xmlparse.c) in expat before 2.1.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via an XML file with many identifiers with the same value.


2) Memory leak (CVE-ID: CVE-2012-1148)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the poolGrow function in expat/lib/xmlparse.c in expat before 2.1.0 allows context-dependent attackers to cause a denial of service (memory consumption) via a large number of crafted XML files that cause improperly-handled reallocation failures when expanding entities. A remote attacker can perform a denial of service attack.


Remediation

Install update from vendor's website.

References