CVE-2020-26978

NameCVE-2020-26978
DescriptionUsing techniques that built on the slipstream research, 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 < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2496-1, DLA-2497-1, DSA-4813-1, DSA-4815-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid125.0.1-2fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)115.10.0esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.10.0esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.10.0esr-1~deb12u1fixed
trixie115.8.0esr-1fixed
sid115.10.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:115.9.0-1~deb10u1fixed
bullseye1:115.7.0-1~deb11u1fixed
bullseye (security)1:115.9.0-1~deb11u1fixed
bookworm1:115.7.0-1~deb12u1fixed
bookworm (security)1:115.9.0-1~deb12u1fixed
sid1:115.9.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)84.0-1
firefox-esrsourcestretch78.6.0esr-1~deb9u1DLA-2496-1
firefox-esrsourcebuster78.6.0esr-1~deb10u1DSA-4813-1
firefox-esrsource(unstable)78.6.0esr-1
thunderbirdsourcestretch1:78.6.0-1~deb9u1DLA-2497-1
thunderbirdsourcebuster1:78.6.0-1~deb10u1DSA-4815-1
thunderbirdsource(unstable)1:78.6.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26978
https://www.mozilla.org/en-US/security/advisories/mfsa2020-55/#CVE-2020-26978
https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26978

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