CVE-2020-15676

NameCVE-2020-15676
DescriptionFirefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2387-1, DLA-2408-1, DSA-4768-1, DSA-4770-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid124.0.1-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)115.9.1esr-1~deb10u1fixed
bullseye115.7.0esr-1~deb11u1fixed
bullseye (security)115.9.1esr-1~deb11u1fixed
bookworm115.7.0esr-1~deb12u1fixed
bookworm (security)115.9.1esr-1~deb12u1fixed
trixie115.8.0esr-1fixed
sid115.9.1esr-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)81.0-1
firefox-esrsourcestretch78.3.0esr-1~deb9u1DLA-2387-1
firefox-esrsourcebuster78.3.0esr-1~deb10u1DSA-4768-1
firefox-esrsource(unstable)78.3.0esr-1
thunderbirdsourcestretch1:78.3.1-2~deb9u1DLA-2408-1
thunderbirdsourcebuster1:78.3.1-2~deb10u2DSA-4770-1
thunderbirdsource(unstable)1:78.3.1-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/#CVE-2020-15676
https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/#CVE-2020-15676
https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/#CVE-2020-15676

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