Vulnerability Details : CVE-2020-6806
By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-6806
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-6806
52.58%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 98 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-6806
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2020-6806
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-6806
-
http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html
Firefox js::ReadableStreamCloseInternal Out-Of-Bounds Access ≈ Packet StormThird Party Advisory;VDB Entry
-
https://www.mozilla.org/security/advisories/mfsa2020-08/
Security Vulnerabilities fixed in Firefox 74 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2020-09/
Security Vulnerabilities fixed in Firefox ESR 68.6 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2020-10/
Security Vulnerabilities fixed in Thunderbird 68.6 — MozillaVendor Advisory
-
https://usn.ubuntu.com/4335-1/
USN-4335-1: Thunderbird vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://usn.ubuntu.com/4328-1/
USN-4328-1: Thunderbird vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1612308
Access DeniedIssue Tracking;Permissions Required
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