Several vulnerabilities have been discovered in phpBB, a fully featured and skinnable flat webforum. The Common Vulnerabilities and Exposures project identifies the following problems:
Multiple interpretation errors allow remote authenticated users to inject arbitrary web script when remote avatars and avatar uploading are enabled.
phpBB allows remote attackers to bypass protection mechanisms that deregister global variables that allows attackers to manipulate the behaviour of phpBB.
phpBB allows remote attackers to bypass security checks when register_globals is enabled and the session_start function has not been called to handle a session.
phpBB allows remote attackers to modify global variables and bypass security mechanisms.
Multiple cross-site scripting (XSS) vulnerabilities allow remote attackers to inject arbitrary web scripts.
An SQL injection vulnerability allows remote attackers to execute arbitrary SQL commands.
phpBB allows remote attackers to modify regular expressions and execute PHP code via the signature_bbcode_uid parameter.
Missing input sanitising of the topic type allows remote attackers to inject arbitrary SQL commands.
Missing request validation permitted remote attackers to edit private messages of other users.
The old stable distribution (woody) does not contain phpbb2 packages.
For the stable distribution (sarge) these problems have been fixed in version 2.0.13+1-6sarge2.
For the unstable distribution (sid) these problems have been fixed in version 2.0.18-1.
We recommend that you upgrade your phpbb2 packages.