| 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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 113.0.2-1 | fixed |
| firefox-esr (PTS) | buster | 91.12.0esr-1~deb10u1 | fixed |
| buster (security) | 102.11.0esr-1~deb10u1 | fixed | |
| bullseye | 102.10.0esr-1~deb11u1 | fixed | |
| bullseye (security) | 102.11.0esr-1~deb11u1 | fixed | |
| bookworm, sid | 102.11.0esr-1 | fixed | |
| thunderbird (PTS) | buster | 1:91.12.0-1~deb10u1 | fixed |
| buster (security) | 1:102.11.0-1~deb10u1 | fixed | |
| bullseye | 1:102.10.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:102.11.0-1~deb11u1 | fixed | |
| bookworm, sid | 1:102.11.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| firefox | source | (unstable) | (not affected) | |||
| firefox-esr | source | (unstable) | (not affected) | |||
| thunderbird | source | (unstable) | (not affected) |
- 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