CVE-2020-26961

State: Published
Severity: Not scored
Published: Dec 9, 2020
Updated: Aug 4, 2024
Reserved: Oct 12, 2020

Description

When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
FirefoxMozilla	< 83Affected
Firefox ESRMozilla	< 78.5Affected
ThunderbirdMozilla	< 78.5Affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1672528
https://www.mozilla.org/security/advisories/mfsa2020-50/
https://www.mozilla.org/security/advisories/mfsa2020-52/
https://www.mozilla.org/security/advisories/mfsa2020-51/

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