smbfs in Samba 3.5.8 and earlier attempts to use (1) mount.cifs to append to the /etc/mtab file and (2) umount.cifs to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66702
https://bugzilla.redhat.com/show_bug.cgi?id=688980
http://openwall.com/lists/oss-security/2011/04/01/2
http://openwall.com/lists/oss-security/2011/03/31/4
http://openwall.com/lists/oss-security/2011/03/31/3
http://openwall.com/lists/oss-security/2011/03/22/6
http://openwall.com/lists/oss-security/2011/03/22/4
http://openwall.com/lists/oss-security/2011/03/15/6
http://openwall.com/lists/oss-security/2011/03/14/7
http://openwall.com/lists/oss-security/2011/03/14/5
http://openwall.com/lists/oss-security/2011/03/14/16
http://openwall.com/lists/oss-security/2011/03/07/9
http://openwall.com/lists/oss-security/2011/03/05/7
http://openwall.com/lists/oss-security/2011/03/05/3
http://openwall.com/lists/oss-security/2011/03/04/9
http://openwall.com/lists/oss-security/2011/03/04/12