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TI-2023-00518 Aliases CVE-2023-0547GHSA-r9gq-fgfv-3p2p

Improper certificate validation in Mozilla Thunderbird

Priority LOW 29CWE-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, 1 without a fix

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

Summary

OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted. Thunderbird versions from 68 to 102.9.1 were affected by this bug. This vulnerability affects Thunderbird < 102.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 102.10Red Hat: 8 advisoriesRed Hat: 12 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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 102.10102.10Patch availableCNA
  • Thunderbird VendorMozilla Affected before 102.10 Fixed in 102.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*68.0 to before 102.10VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions 68.0 to before 102.10 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 102.10

Red Hat 8 advisories

  • RHSA-2023:1806 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.10.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.10.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.10.0-2.el7_9
  • RHSA-2023:1810 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-102.10.0-2.el9_0
  • RHSA-2023:1811 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-102.10.0-2.el8_6
Show 5 more Red Hat advisories
  • RHSA-2023:1809 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.10.0-2.el9_1
  • RHSA-2023:1804 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-102.10.0-2.el8_4
  • RHSA-2023:1805 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-102.10.0-2.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-102.10.0-2.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-102.10.0-2.el8_2
  • RHSA-2023:1802 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.10.0-2.el8_7
  • RHSA-2023:1803 Released 2023-04-17 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.10.0-2.el8_1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Thunderbird 102.10

    9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2023-13916 A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization…Priority MEDIUM 62
    • TI-2023-13903 Following a Garbage Collector compaction, weak maps may have been accessed before they…Priority MEDIUM 62
    • TI-2023-13901 A website could have obscured the fullscreen notification by using a combination of…Priority MEDIUM 53
    Show all 9 records →

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 AppStream (v. 8)Fixed RHSA-2023:1802
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:1809
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:1805
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:1803
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:1805
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2023:1804
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:1811
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:1810
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:1805
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:1806
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:1806
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:1806

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-0547
  2. 2026-10-03 Alias added: GHSA-r9gq-fgfv-3p2p

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