VulnerabilityModified
CVE-2020-6821
Previously, this memory was uninitialized, leading to potentially sensitive data disclosure.
HIGH 7.5EPSS 1.50%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.50% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-908
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1625404Issue 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=1625404Issue 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.