The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.
http://bugzilla.novell.com/show_bug.cgi?id=875690
http://linux.oracle.com/errata/ELSA-2014-0771.html
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.html
http://rhn.redhat.com/errata/RHSA-2014-0512.html
https://bugzilla.redhat.com/show_bug.cgi?id=1094232
http://secunia.com/advisories/59218
http://secunia.com/advisories/59262
http://secunia.com/advisories/59599
https://github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7441633dc3ace00
http://support.f5.com/kb/en-us/solutions/public/15000/300/sol15319.html
http://www.debian.org/security/2014/dsa-2926
http://www.debian.org/security/2014/dsa-2928
http://www.exploit-db.com/exploits/33516
http://www.openwall.com/lists/oss-security/2014/05/05/6
http://www.ubuntu.com/usn/USN-2196-1
http://www.ubuntu.com/usn/USN-2197-1
http://www.ubuntu.com/usn/USN-2198-1
http://www.ubuntu.com/usn/USN-2199-1
http://www.ubuntu.com/usn/USN-2200-1
http://www.ubuntu.com/usn/USN-2201-1
http://www.ubuntu.com/usn/USN-2202-1
Published: 2014-05-07
Base Score: 6.9
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
Severity: Medium