AppendEncodedAttributeValue(), ExtraSpaceNeededForAttrEncoding()
and AppendEncodedCharacters()
could have experienced integer overflows, causing underallocation of an output buffer leading to an out of bounds write. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.
bugzilla.mozilla.org/show_bug.cgi?id=1880692
lists.debian.org/debian-lts-announce/2024/03/msg00022.html
lists.debian.org/debian-lts-announce/2024/03/msg00028.html
www.mozilla.org/security/advisories/mfsa2024-12/
www.mozilla.org/security/advisories/mfsa2024-13/
www.mozilla.org/security/advisories/mfsa2024-14/