`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.
The product performs a calculation to determine how much memory to allocate, but an integer overflow can occur that causes less memory to be allocated than expected, leading to a buffer overflow.
Link | Tags |
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https://bugzilla.mozilla.org/show_bug.cgi?id=1880692 | issue tracking exploit vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2024-12/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2024-13/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2024-14/ | vendor advisory |
https://lists.debian.org/debian-lts-announce/2024/03/msg00022.html | mailing list |
https://lists.debian.org/debian-lts-announce/2024/03/msg00028.html | mailing list |