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[SECURITY] [DLA 1942-2] phpbb3 regression update

This is a follow-up to DLA-1942-1.

There was some confusion about the correct
fix for CVE-2019-13776.

The correct announcement for this DLA should have been:

Package        : phpbb3
Version        : 3.0.12-5+deb8u4
CVE ID         : CVE-2019-13776 CVE-2019-16993


   In phpBB, includes/acp/acp_bbcodes.php had improper verification of a
   CSRF token on the BBCode page in the Administration Control Panel. An
   actual CSRF attack was possible if an attacker also managed to retrieve
   the session id of a reauthenticated administrator prior to targeting


   phpBB allowed the stealing of an Administration Control Panel session id
   by leveraging CSRF in the Remote Avatar feature. The CSRF Token Hijacking
   lead to stored XSS.

For Debian 8 "Jessie", these problems have been fixed in version

We recommend that you upgrade your phpbb3 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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