Scientific Linux SL5.x Advisory: CVE-2007-6285 Critical Autofs Risk

Date: Fri, 21 Dec 2007 15:59:44 -0600
Reply-To: Troy Dawson 
Sender: Security Errata for Scientific Linux
 
From: Troy Dawson 
Subject: Security ERRATA for autofs on SL5.x i386/x86_64
Comments: To: "This email address is being protected from spambots. You need JavaScript enabled to view it."
 

Synopsis:	Important: autofs security update
Issue date:	2007-12-20
CVE Names:	CVE-2007-6285

There was a security issue with the default configuration of autofs version
5, whereby the entry for the "-hosts" map did not specify the "nodev" mount
option. A local user with control of a remote NFS server could create
special device files on the remote file system, that if mounted using the
default "-hosts" map, could allow the user to access important system
devices. (CVE-2007-6285)

This issue is similar to CVE-2007-5964, which fixed a missing "nosuid"
mount option in autofs. Both the "nodev" and "nosuid" options should be
enabled to prevent a possible compromise of machine integrity.

Due to the fact that autofs always mounted "-hosts" map entries "dev" by
default, autofs has now been altered to always use the "nodev" option when
mounting from the default "-hosts" map. The "dev" option must be explicitly
given in the master map entry to revert to the old behavior. This change
affects only the "-hosts" map which corresponds to the "/net" entry in the
default configuration.

SL 5.x

 SRPMS:
autofs-5.0.1-0.rc2.55.el5.2.src.rpm
 i386:
autofs-5.0.1-0.rc2.55.el5_1.2.i386.rpm
 x86_64:
autofs-5.0.1-0.rc2.55.el5_1.2.x86_64.rpm

-Connie Sieh
-Troy Dawson