Vulnerability identifier: #VU33563

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5376

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Description

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

Use-after-free while manipulating XSL in XSLT documents. 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/95758
http://www.securitytracker.com/id/1037693
http://bugzilla.mozilla.org/show_bug.cgi?id=1311687
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.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.