Vulnerability identifier: #VU42054

Vulnerability risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

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 - 3.1.10, 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, 3.10 - 3.10.29, 3.11 - 3.11.10, 3.12 - 3.12.10, 3.13

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

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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.