Race condition in the safe_open function in the Mutt mail client 1.5.12 and earlier, when creating temporary files in an NFS filesystem, allows local users to overwrite arbitrary files due to limitations of the use of the O_EXCL flag on NFS filesystems.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10601
http://www.vupen.com/english/advisories/2006/4176
http://www.ubuntu.com/usn/usn-373-1
http://www.trustix.org/errata/2006/0061/
http://www.securityfocus.com/bid/20733
http://www.redhat.com/support/errata/RHSA-2007-0386.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:190
http://secunia.com/advisories/25529
http://secunia.com/advisories/22686
http://secunia.com/advisories/22685
http://secunia.com/advisories/22640