#VU33566 Input validation error - CVE-2017-5383

Vulnerability identifier: #VU33566

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-5383

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger punycode display, allowing for domain name spoofing attacks in the location bar. 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/95769
https://www.securitytracker.com/id/1037693
https://bugzilla.mozilla.org/show_bug.cgi?id=1323338
https://bugzilla.mozilla.org/show_bug.cgi?id=1324716
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.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.