CVE-2020-6821

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 v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.mozilla.org/security/advisories/mfsa2020-13/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-14/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-12/	Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1625404	Issue Tracking Permissions Required
https://usn.ubuntu.com/4335-1/	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox::::::::
	cpe:2.3:a:mozilla:firefox_esr::::::::
	cpe:2.3:a:mozilla:thunderbird::::::::

Information

Published : 2020-04-24 09:15

Updated : 2021-07-21 04:39

NVD link : CVE-2020-6821

Mitre link : CVE-2020-6821

JSON object : View

CWE

CWE-908

Use of Uninitialized Resource

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Products Affected

mozilla

firefox
firefox_esr
thunderbird

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