CVE-2017-5383

Description

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.99% Top 20%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Thunderbird
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2017-03/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2017-02/ vendor advisory
https://security.gentoo.org/glsa/201702-22 third party advisory vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1323338 vendor advisory issue tracking
https://www.debian.org/security/2017/dsa-3832 third party advisory vendor advisory
https://security.gentoo.org/glsa/201702-13 third party advisory vendor advisory
https://www.debian.org/security/2017/dsa-3771 third party advisory vendor advisory
http://www.securitytracker.com/id/1037693 third party advisory vdb entry
https://www.mozilla.org/security/advisories/mfsa2017-01/ vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0190.html third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0238.html third party advisory vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1324716 vendor advisory issue tracking
http://www.securityfocus.com/bid/95769 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-5383?
CVE-2017-5383 has been scored as a medium severity vulnerability.
How to fix CVE-2017-5383?
To fix CVE-2017-5383, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5383 being actively exploited in the wild?
It is possible that CVE-2017-5383 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5383?
CVE-2017-5383 affects Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox.
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