#VU33562 Buffer overflow - CVE-2017-5375

Vulnerability identifier: #VU33562

Vulnerability risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

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