CVE-2020-15663

NameCVE-2020-15663
DescriptionIf Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid107.0-1fixed
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
bookworm, sid1:102.5.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)(not affected)
firefox-esrsource(unstable)(not affected)
thunderbirdsource(unstable)(not affected)

Notes

- firefox <not-affected> (Only affects Windows)
- firefox-esr <not-affected> (Only affects Windows)
- thunderbird <not-affected> (Only affects Windows)
https://www.mozilla.org/en-US/security/advisories/mfsa2020-36/#CVE-2020-15663
https://www.mozilla.org/en-US/security/advisories/mfsa2020-37/#CVE-2020-15663
https://www.mozilla.org/en-US/security/advisories/mfsa2020-40/#CVE-2020-15663

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