Vulnerability Monitor

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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.

Published

2021-01-07T14:15:12.000

Last Modified

2024-11-21T05:20:36.540

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 84.0	Yes
Application	mozilla	firefox_esr	< 78.6.0	Yes
Application	mozilla	thunderbird	< 78.6.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1681022 Permissions Required ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-54/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-55/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-56/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1681022 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-54/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-55/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-56/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)