CVE-2020-6821

CVE-2020-6821

EPSS 1.5%

When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.

Affected products

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1625404 https://usn.ubuntu.com/4335-1/https://www.mozilla.org/security/advisories/mfsa2020-12/https://www.mozilla.org/security/advisories/mfsa2020-13/https://www.mozilla.org/security/advisories/mfsa2020-14/