CVE-2020-6806

CVE-2020-6806

EPSS 2.5%

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.

Affected products

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html https://bugzilla.mozilla.org/show_bug.cgi?id=1612308 https://usn.ubuntu.com/4328-1/https://usn.ubuntu.com/4335-1/https://www.mozilla.org/security/advisories/mfsa2020-08/https://www.mozilla.org/security/advisories/mfsa2020-09/https://www.mozilla.org/security/advisories/mfsa2020-10/