Medium severity · published Nov 21, 2023
CVE-2023-6205
It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash
6.5
CVSS
0.9%
EPSS
No
On KEV
Description
It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 120.0 · source: NVD
DL
Debian Linux · Debian
10.0; 11.0; 12.0 · source: NVD
FE
Firefox Esr · Mozilla
before 115.5.0 · source: NVD
TH
Thunderbird · Mozilla
before 115.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6205
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6205
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1854076
Mailing List
https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
Third Party Advisory
https://www.debian.org/security/2023/dsa-5561
Release Notes
https://www.mozilla.org/security/advisories/mfsa2023-49/
Release Notes
https://www.mozilla.org/security/advisories/mfsa2023-50/
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