| Name | CVE-2021-23961 |
| Description | Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85. |
| 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-2632-1, DLA-2633-1, DSA-4895-1, DSA-4897-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 125.0.1-2 | fixed |
| firefox-esr (PTS) | buster | 91.12.0esr-1~deb10u1 | fixed |
| buster (security) | 115.10.0esr-1~deb10u1 | fixed | |
| bullseye | 115.7.0esr-1~deb11u1 | fixed | |
| bullseye (security) | 115.10.0esr-1~deb11u1 | fixed | |
| bookworm | 115.7.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 115.10.0esr-1~deb12u1 | fixed | |
| trixie | 115.8.0esr-1 | fixed | |
| sid | 115.10.0esr-1 | fixed | |
| thunderbird (PTS) | buster | 1:91.12.0-1~deb10u1 | fixed |
| buster (security) | 1:115.9.0-1~deb10u1 | fixed | |
| bullseye | 1:115.7.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:115.9.0-1~deb11u1 | fixed | |
| bookworm | 1:115.7.0-1~deb12u1 | fixed | |
| bookworm (security) | 1:115.9.0-1~deb12u1 | fixed | |
| sid | 1:115.9.0-1 | 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) | 85.0-1 | |||
| firefox-esr | source | stretch | 78.10.0esr-1~deb9u1 | DLA-2633-1 | ||
| firefox-esr | source | buster | 78.10.0esr-1~deb10u1 | DSA-4895-1 | ||
| firefox-esr | source | (unstable) | 78.10.0esr-1 | |||
| thunderbird | source | stretch | 1:78.10.0-1~deb9u1 | DLA-2632-1 | ||
| thunderbird | source | buster | 1:78.10.0-1~deb10u1 | DSA-4897-1 | ||
| thunderbird | source | (unstable) | 1:78.10.0-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/#CVE-2021-23961
https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-23961
https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-23961