Vulnerability identifier: #VU33562

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-5375

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

Mitigation
Install update from vendor's website.

External links
http://rhn.redhat.com/errata/RHSA-2017-0190.html
http://rhn.redhat.com/errata/RHSA-2017-0238.html
http://www.securityfocus.com/bid/95757
http://www.securitytracker.com/id/1037693
http://bugzilla.mozilla.org/show_bug.cgi?id=1325200
http://security.gentoo.org/glsa/201702-13
http://security.gentoo.org/glsa/201702-22
http://www.debian.org/security/2017/dsa-3771
http://www.debian.org/security/2017/dsa-3832
http://www.exploit-db.com/exploits/42327/
http://www.exploit-db.com/exploits/44293/
http://www.exploit-db.com/exploits/44294/
http://www.mozilla.org/security/advisories/mfsa2017-01/
http://www.mozilla.org/security/advisories/mfsa2017-02/
http://www.mozilla.org/security/advisories/mfsa2017-03/

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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, proof of concept for this vulnerability is available.