CVE-2020-26976

NameCVE-2020-26976
DescriptionWhen a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.
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-2539-1, DLA-2541-1, DSA-4840-1, DSA-4842-1
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)84.0-1
firefox-esrsourcestretch78.7.0esr-1~deb9u1DLA-2539-1
firefox-esrsourcebuster78.7.0esr-1~deb10u1DSA-4840-1
firefox-esrsource(unstable)78.7.0esr-1
thunderbirdsourcestretch1:78.7.0-1~deb9u1DLA-2541-1
thunderbirdsourcebuster1:78.7.0-1~deb10u1DSA-4842-1
thunderbirdsource(unstable)1:78.7.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2020-26976
https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26976
https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/#CVE-2020-26976

Search for package or bug name: Reporting problems