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AUSCERT External Security Bulletin Redistribution
[SECURITY] [DLA 1942-2] phpbb3 security update
8 October 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Cross-site Request Forgery -- Remote with User Interaction
CVE Names: CVE-2019-16993 CVE-2019-13776
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running phpbb3 check for an updated version of the software for
their operating system.
Revision History: October 8 2019: Updated to DLA 1942-2
October 1 2019: Initial Release
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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.
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