Ubuntu.comUB:CVE-2020-6821CVE-2020-6821
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.002 Low
EPSS
Percentile
58.3%
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.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 75.0+build3-0ubuntu0.18.04.1 | UNKNOWN |
| ubuntu | 19.10 | noarch | firefox | < 75.0+build3-0ubuntu0.19.10.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 20.10 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 75.0+build3-0ubuntu1 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2020-6821
nvd.nist.gov/vuln/detail/CVE-2020-6821
security-tracker.debian.org/tracker/CVE-2020-6821
ubuntu.com/security/notices/USN-4323-1
ubuntu.com/security/notices/USN-4328-1
ubuntu.com/security/notices/USN-4335-1
www.cve.org/CVERecord?id=CVE-2020-6821
www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6821
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.002 Low
EPSS
Percentile
58.3%