High severity · published Oct 1, 2020
CVE-2020-15669
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified
8.8
CVSS
1.1%
EPSS
No
On KEV
Description
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Firefox Esr · Mozilla
before 68.12 · source: NVD
TH
Thunderbird · Mozilla
before 68.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15669
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15669
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1656957
Release Notes
https://www.mozilla.org/security/advisories/mfsa2020-37/
Release Notes
https://www.mozilla.org/security/advisories/mfsa2020-40/
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