CVE-2018-5121

Description

Low descenders on some Tibetan characters in several fonts on OS X are clipped when rendered in the addressbar. When used as part of an Internationalized Domain Name (IDN) this can be used for domain name spoofing attacks. Note: This attack only affects OS X operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 58.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.18% Top 25%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1040270 vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1402368 issue tracking permissions required
http://www.securityfocus.com/bid/102786 vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-5121?
CVE-2018-5121 has been scored as a medium severity vulnerability.
How to fix CVE-2018-5121?
To fix CVE-2018-5121, 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-2018-5121 being actively exploited in the wild?
It is possible that CVE-2018-5121 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-5121?
CVE-2018-5121 affects Mozilla Firefox.
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