USN-1249-1: BackupPC vulnerabilities

Ubuntu Security Notice USN-1249-1

27th October, 2011

backuppc vulnerabilites

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS


BackupPC could be made to expose sensitive information over the network.

Software description

  • backuppc - high-performance, enterprise-grade system for backing up PCs


It was discovered that BackupPC did not properly sanitize its input when
processing backup browser error messages, resulting in a cross-site
scripting (XSS) vulnerability. With cross-site scripting vulnerabilities,
if a user were tricked into viewing server output during a crafted server
request, a remote attacker could exploit this to modify the contents, or
steal confidential data, within the same domain. This issue did not affect
Ubuntu 11.10. (CVE-2011-3361)

Jamie Strandboge discovered that BackupPC did not properly sanitize its
input when processing log file viewer error messages, resulting in
cross-site scripting (XSS) vulnerabilities.

Update instructions

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

Ubuntu 11.10:
backuppc 3.2.1-1ubuntu1.1
Ubuntu 11.04:
backuppc 3.2.0-3ubuntu4.2
Ubuntu 10.10:
backuppc 3.1.0-9ubuntu2.2
Ubuntu 10.04 LTS:
backuppc 3.1.0-9ubuntu1.2
Ubuntu 8.04 LTS:
backuppc 3.0.0-4ubuntu1.3

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.