Vulnerability Details : CVE-2020-26974
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-26974
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-26974
0.61%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-26974
| 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-2020-26974
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-26974
-
https://www.mozilla.org/security/advisories/mfsa2020-56/
Security Vulnerabilities fixed in Thunderbird 78.6 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2020-55/
Security Vulnerabilities fixed in Firefox ESR 78.6 — MozillaVendor Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1681022
Access DeniedPermissions Required
-
https://www.mozilla.org/security/advisories/mfsa2020-54/
Security Vulnerabilities fixed in Firefox 84 — MozillaVendor Advisory
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