CVE-2017-5383

moderate-risk
Published 2018-06-11

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.

Do I need to act?

~
2.4% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Redhat Mozilla

References (26)

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0190.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0238.html
Third Party Advisory http://www.securityfocus.com/bid/95769
Third Party Advisory http://www.securitytracker.com/id/1037693
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1323338
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1324716
Third Party Advisory https://security.gentoo.org/glsa/201702-13
Third Party Advisory https://security.gentoo.org/glsa/201702-22
Third Party Advisory https://www.debian.org/security/2017/dsa-3771
Third Party Advisory https://www.debian.org/security/2017/dsa-3832
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-01/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-02/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-03/
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0190.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2017-0238.html
Third Party Advisory http://www.securityfocus.com/bid/95769
Third Party Advisory http://www.securitytracker.com/id/1037693
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1323338
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1324716
Third Party Advisory https://security.gentoo.org/glsa/201702-13
and 6 more references
47
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 6/34 · Minimal
Exposure 20/34 · Moderate