Description
By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. 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=1561502 ↗
- https://security.gentoo.org/glsa/202003-10 ↗
- https://usn.ubuntu.com/4335-1/ ↗