| Name | CVE-2019-11759 | 
| Description | An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
| References | DLA-1987-1, DLA-1997-1, DSA-4549-1, DSA-4571-1 | 
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|---|---|---|
| firefox (PTS) | sid | 144.0.2-1 | fixed | 
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | fixed | 
| bullseye (security) | 140.4.0esr-1~deb11u1 | fixed | |
| bookworm | 128.14.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 140.4.0esr-1~deb12u1 | fixed | |
| trixie | 128.14.0esr-1~deb13u1 | fixed | |
| trixie (security) | 140.4.0esr-1~deb13u1 | fixed | |
| forky, sid | 140.4.0esr-1 | fixed | |
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | fixed | 
| bullseye (security) | 1:140.4.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.14.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 1:140.4.0esr-1~deb12u1 | fixed | |
| trixie | 1:128.14.0esr-1~deb13u1 | fixed | |
| trixie (security) | 1:140.4.0esr-1~deb13u1 | fixed | |
| forky, sid | 1:140.4.0esr-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) | 70.0-1 | |||
| firefox-esr | source | jessie | 68.2.0esr-1~deb8u1 | DLA-1987-1 | ||
| firefox-esr | source | stretch | 68.2.0esr-1~deb9u2 | DSA-4549-1 | ||
| firefox-esr | source | buster | 68.2.0esr-1~deb10u1 | DSA-4549-1 | ||
| firefox-esr | source | (unstable) | 68.2.0esr-1 | |||
| thunderbird | source | jessie | 1:68.2.2-1~deb8u1 | DLA-1997-1 | ||
| thunderbird | source | stretch | 1:68.2.2-1~deb9u1 | DSA-4571-1 | ||
| thunderbird | source | buster | 1:68.2.2-1~deb10u1 | DSA-4571-1 | ||
| thunderbird | source | (unstable) | 1:68.2.1-1 | 
https://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11759
https://www.mozilla.org/en-US/security/advisories/mfsa2019-34/#CVE-2019-11759
https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/#CVE-2019-11759