PublicDateAtUSN: 2020-04-03
Candidate: CVE-2020-6819
PublicDate: 2020-04-24 16:15:00 UTC
References: 
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6819
 https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/#CVE-2020-6819
 https://ubuntu.com/security/notices/USN-4317-1
 https://ubuntu.com/security/notices/USN-4328-1
 https://ubuntu.com/security/notices/USN-4335-1
Description:
 Under certain conditions, when running the nsDocShell destructor, a race
 condition can cause a use-after-free. We are aware of targeted attacks in
 the wild abusing this flaw. This vulnerability affects Thunderbird <
 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
Ubuntu-Description: 
Notes: 
 tyhicks> mozjs contains a copy of the SpiderMonkey JavaScript engine
Mitigation: 
Bugs: 
Priority: high
Discovered-by:
Assigned-to: chrisccoulson
CVSS:
 nvd: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H [8.1 HIGH]

Patches_firefox: 
upstream_firefox: released (74.0.1)
precise/esm_firefox: DNE
trusty_firefox: ignored (out of standard support)
trusty/esm_firefox: DNE
xenial_firefox: released (74.0.1+build1-0ubuntu0.16.04.1)
esm-infra/xenial_firefox: released (74.0.1+build1-0ubuntu0.16.04.1)
bionic_firefox: released (74.0.1+build1-0ubuntu0.18.04.1)
eoan_firefox: released (74.0.1+build1-0ubuntu0.19.10.1)
focal_firefox: released (75.0+build3-0ubuntu1)
devel_firefox: released (75.0+build3-0ubuntu1)

Patches_thunderbird:
Priority_thunderbird: medium
upstream_thunderbird: released (68.7.0)
precise/esm_thunderbird: DNE
trusty_thunderbird: ignored (out of standard support)
trusty/esm_thunderbird: DNE
xenial_thunderbird: released (1:68.7.0+build1-0ubuntu0.16.04.2)
esm-infra/xenial_thunderbird: released (1:68.7.0+build1-0ubuntu0.16.04.2)
bionic_thunderbird: released (1:68.7.0+build1-0ubuntu0.18.04.1)
eoan_thunderbird: released (1:68.7.0+build1-0ubuntu0.19.10.1)
focal_thunderbird: released (1:68.7.0+build1-0ubuntu1)
devel_thunderbird: released (1:68.7.0+build1-0ubuntu1)