Medium severity · published Jul 9, 2020
CVE-2020-12399
NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys
4.4
CVSS
0.7%
EPSS
No
On KEV
Description
NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 77.0 · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
FE
Firefox Esr · Mozilla
before 68.9.0 · source: NVD
TH
Thunderbird · Mozilla
before 68.9.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12399
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12399
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1631576
Mailing List
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
Third Party Advisory
https://security.gentoo.org/glsa/202007-49
Third Party Advisory
https://usn.ubuntu.com/4421-1/
Third Party Advisory
https://www.debian.org/security/2020/dsa-4726
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-20/
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