typo3-src - several

Several vulnerabilities were discovered in TYPO3, a content management
system.

• CVE-2012-3527
  An insecure call to unserialize in the help system enables
  arbitrary code execution by authenticated users.
• CVE-2012-3528
  The TYPO3 backend contains several cross-site scripting
  vulnerabilities.
• CVE-2012-3529
  Authenticated users who can access the configuration module
  can obtain the encryption key, allowing them to escalate their
  privileges.
• CVE-2012-3530
  The RemoveXSS HTML sanitizer did not remove several HTML5
  JavaScript, thus failing to mitigate the impact of cross-site
  scripting vulnerabilities.

For the stable distribution (squeeze), these problems have been fixed
in version 4.3.9+dfsg1-1+squeeze5.

For the testing distribution (wheezy) and the unstable distribution
(sid), these problems have been fixed in version 4.5.19+dfsg1-1.

We recommend that you upgrade your typo3-src packages.