Description
The RBAC functionality in grsecurity before 2.1.11-2.6.24.5 and 2.1.11-2.4.36.2 does not enforce user_transition_deny and user_transition_allow rules for the (1) sys_setfsuid and (2) sys_setfsgid calls, which allows local users to bypass restrictions for those calls.
References
- grsecurity-rbac-security-bypass(41952) vdb-entry
- http://www.grsecurity.org/news.php#grsec21113
- 29899 third-party-advisory
- 1019919 vdb-entry
- ADV-2008-1323 vdb-entry
- 28889 vdb-entry