Vulnerability Monitor

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CVE-2020-12399

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.4, requiring local system access to exploit but requires specific conditions to be met though user interaction is required requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 4 products from mozilla, from mozilla, from mozilla and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-07-09T15:15:10.757

Last Modified

2024-11-21T04:59:38.543

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.4 (MEDIUM)

CVSSv2 Vector

AV:L/AC:H/Au:N/C:P/I:N/A:N

Access Vector: LOCAL
Access Complexity: HIGH
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

1.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 77.0	Yes
Application	mozilla	firefox_esr	< 68.9.0	Yes
Application	mozilla	thunderbird	< 68.9.0	Yes
Operating System	debian	debian_linux	9.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1631576 Issue Tracking, Permissions Required, Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html Mailing List, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202007-49 Third Party Advisory ([email protected])
https://usn.ubuntu.com/4421-1/ Third Party Advisory ([email protected])
https://www.debian.org/security/2020/dsa-4726 Third Party Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-20/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-21/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2020-22/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1631576 Issue Tracking, Permissions Required, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202007-49 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4421-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2020/dsa-4726 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-20/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-21/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2020-22/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mozilla's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.