CVE-2019-9801

Name	CVE-2019-9801
Description	Firefox will accept any registered Program ID as an external protocol handler and offer to launch this local application when given a matching URL on Windows operating systems. This should only happen if the program has specifically registered itself as a "URL Handler" in the Windows registry. Note: This issue only affects Windows operating systems. Other operating systems are unaffected.. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	133.0.3-1	fixed
firefox-esr (PTS)	bullseye	115.14.0esr-1~deb11u1	fixed
	bullseye (security)	128.5.0esr-1~deb11u1	fixed
	bookworm	128.3.1esr-1~deb12u1	fixed
	bookworm (security)	128.5.0esr-1~deb12u1	fixed
	trixie	128.5.0esr-1	fixed
	sid	128.5.1esr-1	fixed
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	fixed
	bullseye (security)	1:128.5.0esr-1~deb11u1	fixed
	bookworm	1:115.16.0esr-1~deb12u1	fixed
	bookworm (security)	1:128.5.0esr-1~deb12u1	fixed
	sid, trixie	1:128.5.2esr-1	fixed

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

Package	Type	Release	Fixed Version
firefox	source	(unstable)	(not affected)
firefox-esr	source	(unstable)	(not affected)
thunderbird	source	(unstable)	(not affected)

Notes

- firefox-esr <not-affected> (Windows-specific)
- firefox <not-affected> (Windows-specific)
- thunderbird <not-affected> (Windows-specific)
https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9801
https://www.mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9801
https://www.mozilla.org/en-US/security/advisories/mfsa2019-11/#CVE-2019-9801