Vulnerability Details : CVE-2020-6831

A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Vulnerability category: OverflowMemory Corruption

Published 2020-05-26 18:15:12

Updated 2021-07-21 11:39:24

Source Mozilla Corporation

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-6831

Probability of exploitation activity in the next 30 days: 1.14%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 83 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-6831

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	[email protected]
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	[email protected]
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-6831

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: [email protected] (Primary)

References for CVE-2020-6831

https://www.mozilla.org/security/advisories/mfsa2020-16/

Vendor Advisory

CVEs referencing this url
https://www.debian.org/security/2020/dsa-4714

Third Party Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2020-17/

Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2020-18/

Vendor Advisory

CVEs referencing this url
http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.html

Third Party Advisory;VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.html

Mailing List;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/4373-1/

Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202005-04

Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202005-03

Patch;Third Party Advisory

CVEs referencing this url

Products affected by CVE-2020-6831

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox
Versions before (<) 76.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Thunderbird
Versions before (<) 68.8.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox Esr
Versions before (<) 68.8.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 19.10
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions
Opensuse » Leap » Version: 15.2
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Matching versions