CVE-2020-12399

MediumCVSS 4.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.4/10CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203

Affected software

Vendor	Product	Versions
Mozilla	Thunderbird	>= unspecified, < 68.9.0
Mozilla	Firefox	>= unspecified, < 77
Mozilla	Firefox ESR	>= unspecified, < 68.9

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1631576Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing List, Third 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
https://www.mozilla.org/security/advisories/mfsa2020-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-22/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1631576Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.htmlMailing List, Third 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
https://www.mozilla.org/security/advisories/mfsa2020-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-22/Vendor Advisory

Timeline

Published: Jul 9, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-12408.8A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'CVE-2020-124004.7When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible tim CVE-2020-124014.7During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resultin CVE-2020-124024.4During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly i CVE-2020-124039.1A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause CVE-2020-124044.3For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That tok CVE-2020-124055.3When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vu CVE-2020-124068.8Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with en CVE-2020-124076.5Mozilla Developer Nicolas Silva found that when using WebRender, Firefox would under certain conditions leak arbitrary GPU memory to the vis CVE-2020-124086.5When browsing a document hosted on an IP address, an attacker could insert certain characters to flip domain and path information in the add CVE-2020-124098.8When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affect CVE-2020-12417.8A security feature bypass vulnerability exists when Windows Kernel fails to properly sanitize certain parameters.To exploit the vulnerabilit