CVE-2021-23961

NameCVE-2021-23961
DescriptionFurther 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2632-1, DLA-2633-1, DSA-4895-1, DSA-4897-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid90.0-1fixed
firefox-esr (PTS)stretch68.10.0esr-1~deb9u1vulnerable
stretch (security)78.12.0esr-1~deb9u1fixed
buster78.11.0esr-1~deb10u1fixed
buster (security)78.12.0esr-1~deb10u1fixed
bullseye, sid78.12.0esr-1fixed
thunderbird (PTS)stretch1:68.10.0-1~deb9u1vulnerable
stretch (security)1:78.12.0-1~deb9u1fixed
buster1:78.6.0-1~deb10u1vulnerable
buster (security)1:78.12.0-1~deb10u1fixed
bullseye, sid1:78.12.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)85.0-1
firefox-esrsourcestretch78.10.0esr-1~deb9u1DLA-2633-1
firefox-esrsourcebuster78.10.0esr-1~deb10u1DSA-4895-1
firefox-esrsource(unstable)78.10.0esr-1
thunderbirdsourcestretch1:78.10.0-1~deb9u1DLA-2632-1
thunderbirdsourcebuster1:78.10.0-1~deb10u1DSA-4897-1
thunderbirdsource(unstable)1:78.10.0-1

Notes

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

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