#VU41718 Race condition in Linux kernel - CVE-2014-0196
Vulnerability identifier: #VU41718
Vulnerability risk: High
CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2014-0196
CWE-ID:
CWE-362
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 3.0 - 3.0.68, 3.1 - 3.14.2, 3.2 - 3.2.30, 3.3 - 3.3.8, 3.4 - 3.4.79, 3.5.1 - 3.5.7, 3.6 - 3.6.11, 3.7 - 3.7.10, 3.8.0 - 3.8.13, 3.9 - 3.9.11
External links
https://bugzilla.novell.com/show_bug.cgi?id=875690
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4291086b1f081b869c6d79e5b7441633dc3ace00
https://linux.oracle.com/errata/ELSA-2014-0771.html
https://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.html
https://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.html
https://pastebin.com/raw.php?i=yTSFUBgZ
https://rhn.redhat.com/errata/RHSA-2014-0512.html
https://secunia.com/advisories/59218
https://secunia.com/advisories/59262
https://secunia.com/advisories/59599
https://source.android.com/security/bulletin/2016-07-01.html
https://support.f5.com/kb/en-us/solutions/public/15000/300/sol15319.html
https://www.debian.org/security/2014/dsa-2926
https://www.debian.org/security/2014/dsa-2928
https://www.exploit-db.com/exploits/33516
https://www.openwall.com/lists/oss-security/2014/05/05/6
https://www.osvdb.org/106646
https://www.ubuntu.com/usn/USN-2196-1
https://www.ubuntu.com/usn/USN-2197-1
https://www.ubuntu.com/usn/USN-2198-1
https://www.ubuntu.com/usn/USN-2199-1
https://www.ubuntu.com/usn/USN-2200-1
https://www.ubuntu.com/usn/USN-2201-1
https://www.ubuntu.com/usn/USN-2202-1
https://www.ubuntu.com/usn/USN-2203-1
https://www.ubuntu.com/usn/USN-2204-1
https://bugzilla.redhat.com/show_bug.cgi?id=1094232
https://github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7441633dc3ace00
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
