Ubuntu Security Notice USN-1527-2
10th September, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
XML-RPC for C and C++ could be made to cause a denial of service by consuming excessive CPU and memory resources.
- xmlrpc-c - Lightweight RPC library based on XML and HTTP
USN-1527-1 fixed vulnerabilities in Expat. This update provides the
corresponding updates for XML-RPC for C and C++. Both issues described in the
original advisory affected XML-RPC for C and C++ in Ubuntu 10.04 LTS, 11.04,
11.10 and 12.04 LTS.
Original advisory details:
It was discovered that Expat computed hash values without restricting the
ability to trigger hash collisions predictably. If a user or application
linked against Expat were tricked into opening a crafted XML file, an attacker
could cause a denial of service by consuming excessive CPU resources.
Tim Boddy discovered that Expat did not properly handle memory reallocation
when processing XML files. If a user or application linked against Expat were
tricked into opening a crafted XML file, an attacker could cause a denial of
service by consuming excessive memory resources. This issue only affected
Ubuntu 8.04 LTS, 10.04 LTS, 11.04 and 11.10. (CVE-2012-1148)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.04 LTS:
- libxmlrpc-core-c3 1.16.33-3.1ubuntu5.1
- Ubuntu 11.10:
- libxmlrpc-core-c3-0 1.16.32-0ubuntu4.1
- Ubuntu 11.04:
- libxmlrpc-core-c3-0 1.16.32-0ubuntu3.1
- Ubuntu 10.04 LTS:
- libxmlrpc-core-c3 1.06.27-1ubuntu7.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart any applications linked
against XML-RPC for C and C++ to effect the necessary changes.