CVE-2021-43542

NameCVE-2021-43542
DescriptionUsing XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2863-1, DLA-2874-1, DSA-5026-1, DSA-5034-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid107.0.1-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)102.5.0esr-1~deb10u1fixed
bullseye91.13.0esr-1~deb11u1fixed
bullseye (security)102.5.0esr-1~deb11u1fixed
bookworm, sid102.5.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:102.5.0-1~deb10u1fixed
bullseye1:91.13.0-1~deb11u1fixed
bullseye (security)1:102.5.0-1~deb11u1fixed
bookworm1:102.5.0-1fixed
sid1:102.5.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)95.0-1
firefox-esrsourcestretch91.4.1esr-1~deb9u1DLA-2863-1
firefox-esrsourcebullseye91.4.1esr-1~deb11u1DSA-5026-1
firefox-esrsource(unstable)91.4.0esr-1
thunderbirdsourcestretch1:91.4.1-1~deb9u1DLA-2874-1
thunderbirdsourcebuster1:91.4.1-1~deb10u1DSA-5034-1
thunderbirdsourcebullseye1:91.4.1-1~deb11u1DSA-5034-1
thunderbirdsource(unstable)1:91.4.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-52/#CVE-2021-43542
https://www.mozilla.org/en-US/security/advisories/mfsa2021-53/#CVE-2021-43542
https://www.mozilla.org/en-US/security/advisories/mfsa2021-54/#CVE-2021-43542

Search for package or bug name: Reporting problems