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TI-2023-00407 Aliases CVE-2023-0430GHSA-gg8h-rvx3-6c4c

Improper certificate validation in Mozilla Thunderbird

Priority MEDIUM 62CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-295.

Summary

Certificate OCSP revocation status was not checked when verifying S/Mime signatures. Mail signed with a revoked certificate would be displayed as having a valid signature. Thunderbird versions from 68 to 102.7.0 were affected by this bug. This vulnerability affects Thunderbird < 102.7.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 102.7.1Red Hat: 8 advisoriesRed Hat: 12 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 102.7.1102.7.1Patch availableCNA
  • Thunderbird VendorMozilla Affected before 102.7.1 Fixed in 102.7.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*68.0 to before 102.7.1VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions 68.0 to before 102.7.1 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 102.7.1

Red Hat 8 advisories

  • RHSA-2023:0606 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.7.1-2.el8_7
  • RHSA-2023:0608 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.7.1-2.el9_1
  • RHSA-2023:0607 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-102.7.1-2.el9_0
Show 5 more Red Hat advisories
  • RHSA-2023:0605 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-102.7.1-2.el8_6
  • RHSA-2023:0600 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.7.1-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.7.1-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.7.1-2.el7_9
  • RHSA-2023:0603 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-102.7.1-2.el8_4
  • RHSA-2023:0602 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-102.7.1-2.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-102.7.1-2.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-102.7.1-2.el8_2
  • RHSA-2023:0601 Released 2023-02-06 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.7.1-2.el8_1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:0606
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:0608
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:0602
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:0601
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:0602
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2023:0603
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:0605
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:0607
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:0602
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:0600
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:0600
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:0600

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-0430
  2. 2026-10-03 Alias added: GHSA-gg8h-rvx3-6c4c

References

Advisory 2

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 2067 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences