Joined: 12 May 2004
|Posted: Tue Apr 03, 2007 11:26 pm Post subject: [ GLSA 200704-03 ] OpenAFS: Privilege escalation
|Gentoo Linux Security Advisory
Title: OpenAFS: Privilege escalation (GLSA 200704-03)
Date: April 03, 2007
OpenAFS is subject to a design flaw that could allow privilege escalation on the client.
OpenAFS is a distributed network filesystem.
Vulnerable: < 1.4.4
Unaffected: >= 1.4.4
Architectures: All supported architectures
Benjamin Bennett discovered that the OpenAFS client contains a design flaw where cache managers do not use authenticated server connections when performing actions not requested by a user.
If setuid is enabled on the client cells, an attacker can supply a fake FetchStatus reply that sets setuid and root ownership of a file being executed. This could provide root access on the client. Remote attacks may be possible if an attacker can entice a user to execute a known file. Note that setuid is enabled by default in versions of OpenAFS prior to 1.4.4.
Disable the setuid functionality on all client cells. This is now the default configuration in OpenAFS.
All OpenAFS users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/openafs-1.4.4"