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Ubuntu Security Notice USN-1527-2

Ubuntu Security Notice USN-1527-2
Posted Sep 11, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1527-2 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2012-0876, CVE-2012-1148, CVE-2012-0876, CVE-2012-1148
SHA-256 | 77e4cdf3916d0a3eaf18bb43b6c4ac9ccc99707ff8d1c509b50defe8afe47337

Ubuntu Security Notice USN-1527-2

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============================================================================
Ubuntu Security Notice USN-1527-2
September 10, 2012

xmlrpc-c vulnerabilities
============================================================================

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

Summary:

XML-RPC for C and C++ could be made to cause a denial of service by consuming
excessive CPU and memory resources.

Software Description:
- xmlrpc-c: Lightweight RPC library based on XML and HTTP

Details:

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.
(CVE-2012-0876)

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

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

After a standard system upgrade you need to restart any applications linked
against XML-RPC for C and C++ to effect the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1527-2
http://www.ubuntu.com/usn/usn-1527-1
CVE-2012-0876, CVE-2012-1148

Package Information:
https://launchpad.net/ubuntu/+source/xmlrpc-c/1.16.33-3.1ubuntu5.1
https://launchpad.net/ubuntu/+source/xmlrpc-c/1.16.32-0ubuntu4.1
https://launchpad.net/ubuntu/+source/xmlrpc-c/1.16.32-0ubuntu3.1
https://launchpad.net/ubuntu/+source/xmlrpc-c/1.06.27-1ubuntu7.1
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