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CVE-2020-26961

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CVSS 3.1
6.5 medium
EPSS
1%p65
Published
()
Modified
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.

Vendors
mozilla
Products
firefox, firefox esr, thunderbird
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD CVE.org GitHub PoCs EPSS (1.2%)

In the news

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