CVEvulnerability
CVE-2020-6821
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-04-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-908
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.
Affected configurations
• mozilla firefox (< 75.0)
• mozilla firefox esr (< 68.7.0)
• mozilla thunderbird (< 68.7.0)
Related
Weakness · CWE (1)
- CWE-908 Use of Uninitialized Resource weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1625404 Issue Tracking, Permissions Required
- https://usn.ubuntu.com/4335-1/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-12/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-13/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-14/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1625404 Issue Tracking, Permissions Required
- https://usn.ubuntu.com/4335-1/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-12/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-13/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-14/ Vendor Advisory