mount-cifs: Multiple vulnerabilites

Background

mount-cifs is the cifs filesystem mount helper split from Samba.

Description

Multiple vulnerabilities have been discovered in mount-cifs. Please review the CVE identifiers referenced below for details.

Impact

The vulnerabilities allow local users to cause a denial of service (mtab corruption) via a crafted string. Also, local users could mount a CIFS share on an arbitrary mountpoint, and gain privileges via a symlink attack on the mountpoint directory file.

Workaround

There is no known workaround at this time.

Resolution

Gentoo has discontinued support for mount-cifs. We recommend that users unmerge mount-cifs:

 # emerge --unmerge "net-fs/mount-cifs"