By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
CPE | Name | Operator | Version |
---|---|---|---|
ubuntu_linux | eq | 18.04 | |
ubuntu_linux | eq | 19.10 | |
ubuntu_linux | eq | 16.04 | |
firefox | lt | 74.0 | |
firefox_esr | lt | 68.6.0 | |
thunderbird | lt | 68.6.0 |
packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html
bugzilla.mozilla.org/show_bug.cgi?id=1612308
usn.ubuntu.com/4328-1/
usn.ubuntu.com/4335-1/
www.mozilla.org/security/advisories/mfsa2020-08/
www.mozilla.org/security/advisories/mfsa2020-09/
www.mozilla.org/security/advisories/mfsa2020-10/