Home/CVE/NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private
CVE

CVE-2020-12399

NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private

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.

MEDIUM · CVSS 4.4 EPSS 0.0009
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-203Observable Discrepancy
▤

Affected Products & Versions

4
mozilla firefox< 77.0
mozilla firefox esr< 68.9.0
mozilla thunderbird< 68.9.0
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

4.4
MEDIUM · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jul 2020 · 03:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

13
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:10600-1
suse-csafopenSUSE-SU-2024:11058-1
usnUSN-4421-1
suse-csafSUSE-SU-2020:14418-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1631576Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202007-49Third Party Advisory
https://usn.ubuntu.com/4421-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4726Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-20/Vendor Advisory
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