#VU42054 Input validation error in Linux kernel - CVE-2014-0038

Vulnerability identifier: #VU42054

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-2014-0038

CWE-ID: CWE-20

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 compat_sys_recvmmsg function in net/compat.c in the Linux kernel before 3.13.2, when CONFIG_X86_X32 is enabled, allows local users to gain privileges via a recvmmsg system call with a crafted timeout pointer parameter.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.0.68, 3.1 - 3.13, 3.2 - 3.2.30, 3.3 - 3.3.8, 3.4 - 3.4.32, 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://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2def2ef2ae5f3990aabdbe8a755911902707d268
https://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html
https://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html
https://pastebin.com/raw.php?i=DH3Lbg54
https://secunia.com/advisories/56669
https://www.exploit-db.com/exploits/31346
https://www.exploit-db.com/exploits/31347
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.2
https://www.mandriva.com/security/advisories?name=MDVSA-2014:038
https://www.openwall.com/lists/oss-security/2014/01/31/2
https://www.securityfocus.com/bid/65255
https://www.ubuntu.com/usn/USN-2094-1
https://www.ubuntu.com/usn/USN-2095-1
https://www.ubuntu.com/usn/USN-2096-1
https://bugzilla.redhat.com/show_bug.cgi?id=1060023
https://code.google.com/p/chromium/issues/detail?id=338594
https://github.com/saelo/cve-2014-0038
https://github.com/torvalds/linux/commit/2def2ef2ae5f3990aabdbe8a755911902707d268
https://www.exploit-db.com/exploits/40503/

---

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?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.