CVE-2020-12421

Advisory lineage Upstream: 0 Downstream: 29
Modified
Published: 09 Jul 2020, 14:39
Last modified:04 Aug 2024, 11:56

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.47% LOW
0% probability -1.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Jul 2020, 14:39
Published
Vulnerability first disclosed
04 Aug 2024, 11:56
Last Modified
Vulnerability information updated

Description

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.47%• Percentile: 65%

Techniques & Countermeasures

  • CWE-295•Improper Certificate Validation

    The product does not validate, or incorrectly validates, a certificate.

Affected Systems

  • canonical•ubuntu_linux

    16.04 | 18.04 | 19.10 | 20.04

  • Unknown•Firefox

    < 78.0 | ≥ unspecified, < 78

  • mozilla•firefox_esr

    < 68.10.0 | ≥ unspecified, < 68.10

  • mozilla•thunderbird

    < 68.10.0 | ≥ unspecified, < 68.10.0

References (11)