High severity · published Jul 9, 2020
CVE-2020-12420
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash
8.8
CVSS
1.9%
EPSS
No
On KEV
Description
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
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)1.9% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 78.0 · source: NVD
FE
Firefox Esr · Mozilla
before 68.10.0 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
TH
Thunderbird · Mozilla
before 68.10.0 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12420
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12420
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1643437
Third Party Advisory
https://security.gentoo.org/glsa/202007-09
More from Firefox
10.0
CVE-2019-11708
Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability
9.8
CVE-2024-9680
Mozilla Firefox Use-After-Free Vulnerability
9.8
CVE-2010-3765
Mozilla Multiple Products Remote Code Execution Vulnerability
9.6
CVE-2022-26486
Mozilla Firefox Use-After-Free Vulnerability
8.8
CVE-2023-5217
Google Chromium libvpx Heap Buffer Overflow Vulnerability