CVE-2020-12399 — Observable Discrepancy in Mozilla Firefox

CWE-203 — Observable DiscrepancyCWE-327 — Use of a Broken or Risky Cryptographic Algorithm21 documents9 sources
Severity
4.4MEDIUMNVD
OSV7.5OSV6.5
EPSS
0.1%
top 73.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+2 more
Timeline
PublishedJul 9
Latest updateMay 24

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:NExploitability: 0.8 | Impact: 3.6

Affected Packages11 packages

▶CVEListV5mozilla/firefoxunspecified — 77
▶NVDmozilla/firefox< 77.0
▶CVEListV5mozilla/firefox_esrunspecified — 68.9
▶NVDmozilla/firefox_esr< 68.9.0
▶Ubuntumozilla/firefox< 77.0.1+build1-0ubuntu0.16.04.1+2

Also affects: Debian Linux 9.0

🔴Vulnerability Details

7
GHSA
GHSA-fq62-4j88-qq7x: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys↗2022-05-24
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OSV
CVE-2020-12399: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys↗2020-07-09
▶
CVEList
CVE-2020-12399: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys↗2020-07-09
▶
OSV
thunderbird vulnerabilities↗2020-07-08
▶
OSV
nss vulnerability↗2020-06-17
▶

📋Vendor Advisories

9
Ubuntu
Thunderbird vulnerabilities↗2020-07-08
▶
Ubuntu
NSS vulnerability↗2020-06-17
▶
Ubuntu
NSS vulnerabilities↗2020-06-16
▶
Ubuntu
Firefox vulnerabilities↗2020-06-04
▶
Red Hat
nss: Timing attack on DSA signature generation↗2020-05-21
▶

💬Community

4
Bugzilla
CVE-2020-12399 nss: Timing attack on DSA signature generation [fedora-all]↗2020-05-21
▶
Bugzilla
CVE-2020-12399 nss: Timing attack on DSA signature generation↗2020-04-21
▶
Bugzilla
Timing attack on DSA on NSS library↗2020-04-20
▶
Bugzilla
CVE-2019-12399 kafka: Connect REST API exposes plaintext secrets in tasks endpoint↗2020-01-30
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CVE-2020-12399 — Observable Discrepancy in Mozilla | cvebase