Name | CVE-2020-26961 |
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. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
References | DLA-2457-1, DLA-2464-1, DSA-4793-1, DSA-4796-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
firefox (PTS) | sid | 133.0-1 | fixed |
firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | fixed |
bullseye (security) | 128.5.0esr-1~deb11u1 | fixed | |
bookworm | 128.3.1esr-1~deb12u1 | fixed | |
bookworm (security) | 128.5.0esr-1~deb12u1 | fixed | |
sid, trixie | 128.5.0esr-1 | fixed | |
thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | fixed |
bullseye (security) | 1:128.5.0esr-1~deb11u1 | fixed | |
bookworm | 1:115.16.0esr-1~deb12u1 | fixed | |
bookworm (security) | 1:128.5.0esr-1~deb12u1 | fixed | |
sid, trixie | 1:128.5.0esr-1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
firefox | source | (unstable) | 83.0-1 | |||
firefox-esr | source | stretch | 78.5.0esr-1~deb9u1 | DLA-2457-1 | ||
firefox-esr | source | buster | 78.5.0esr-1~deb10u1 | DSA-4793-1 | ||
firefox-esr | source | (unstable) | 78.5.0esr-1 | |||
thunderbird | source | stretch | 1:78.5.0-1~deb9u1 | DLA-2464-1 | ||
thunderbird | source | buster | 1:78.5.0-1~deb10u1 | DSA-4796-1 | ||
thunderbird | source | (unstable) | 1:78.5.0-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26961
https://www.mozilla.org/en-US/security/advisories/mfsa2020-51/#CVE-2020-26961
https://www.mozilla.org/en-US/security/advisories/mfsa2020-52/#CVE-2020-26961