MSA-14-0020: Identity confusion in Shibboleth authentication

MSA-14-0020: Identity confusion in Shibboleth authentication

by Michael de Raadt -
Number of replies: 0
Description: Shibboleth was allowing empty session IDs and confusing sessions when more than one instance was associated with an empty ID.
Issue summary: User taking over other user's session using Shibboleth authentication plugin
Severity/Risk: Serious
Versions affected: 2.5 to 2.5.6, 2.4 to 2.4.10 and earlier unsupported versions
Versions fixed: 2.5.7 and 2.4.11
Reported by: Colin Campbell
Issue no.: MDL-45485
CVE identifier: CVE-2014-3552
Changes (2.5): http://git.moodle.org/gw?p=moodle.git&a=search&h=refs%2Fheads%2FMOODLE_25_STABLE&st=commit&s=MDL-45485