CVE-2020-6821
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-6821
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-6821.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202004-8
Vendor advisory: arch — https://security.archlinux.org/ASA-202004-12
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 68.7.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 75.0-1 |
| debian | bookworm | fixed | 68.7.0esr-1 |
| debian | bullseye | fixed | 68.7.0esr-1 |
| debian | forky | fixed | 68.7.0esr-1 |
| debian | trixie | fixed | 68.7.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.