grsecurity RBAC improper privilege dropping
| grsecurity-rbac-admin-privileges (24156) |  Medium Risk |
Description:
grsecurity, when configured to use RBAC (Role-Based Access Control) could allow a local attacker to gain elevated privileges. When RBAC is being used, if a user starts a service from an admin role and then logs out without using the gradm -u command, the affected service would retain admin role privileges. A local attacker could exploit this vulnerability to gain access to affected services with elevated privileges.
Platforms Affected:
- grsecurity, grsecurity 2.1.7 and prior
Remedy:
Upgrade to the latest version of grsecurity (2.1.8 or later), available from the grsecurity Web site. See References.
Consequences:
Gain Privileges
References:
- grsecurity News Web site, [01/15] Important update for RBAC users: grsecurity 2.1.8 released for 2.4.32/2.6.14.6 at http://www.grsecurity.org/news.php#grsec218.
- BID-16261: GRSecurity Elevated Service Privileges Weakness
- CVE-2006-0228: The RBAC functionality in grsecurity before 2.1.8 does not properly handle when the admin role creates a service and then exits the shell without unauthenticating, which causes the service to be restarted with the admin role still active.
- SA18458: grsecurity RBAC Admin Role Dropping Security Issue
- VUPEN/ADV-2006-0199: grsecurity RBAC Admin Role Privileges Dropping Local Security Weakness
Reported:
Jan 16, 2006
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