| Name | CVE-2019-12383 |
| Description | Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a "Don't send my language" setting. |
| 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 | 138.0-1 | vulnerable |
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | vulnerable |
| bullseye (security) | 128.9.0esr-1~deb11u1 | vulnerable |
| bookworm | 128.8.0esr-1~deb12u1 | vulnerable |
| bookworm (security) | 128.9.0esr-1~deb12u1 | vulnerable |
| trixie | 128.9.0esr-2 | vulnerable |
| sid | 128.10.0esr-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| firefox | source | (unstable) | (unfixed) | unimportant | | |
| firefox-esr | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://gitweb.torproject.org/tor-browser.git/commit/?id=cbb04b72c68272c2de42f157d40cd7d29a6b7b55
https://hackerone.com/reports/282748
https://trac.torproject.org/projects/tor/ticket/24056
This affects Firefox, but it's not a security issue in Firefox by itself