Description
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
before 70affected
Mozilla Thunderbird
before 68.2affected
Mozilla Firefox ESR
before 68.2affected
References
- https://www.mozilla.org/security/advisories/mfsa2019-35/ ↗
- https://www.mozilla.org/security/advisories/mfsa2019-33/ ↗
- https://www.mozilla.org/security/advisories/mfsa2019-34/ ↗
- https://bugzilla.mozilla.org/show_bug.cgi?id=1577107 ↗
- https://security.gentoo.org/glsa/202003-10 ↗
- https://usn.ubuntu.com/4335-1/ ↗