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TI-2022-01700 Aliases CVE-2022-1834GHSA-qq6h-hx9q-4fxv

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
High · None · None
Fix status
Partial Red Hat: 8 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

When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have displayed all the spaces. This could have been used by an attacker to send an email message with the attacker's digital signature, that was shown with an arbitrary sender email address chosen by the attacker. If the sender name started with a false email address, followed by many Braille space characters, the attacker's email address was not visible. Because Thunderbird compared the invisible sender address with the signature's email address, if the signing key or certificate was accepted by Thunderbird, the email was shown as having a valid digital signature. This vulnerability affects Thunderbird < 91.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00395 33rd percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 91.10Red Hat: 6 advisoriesRed Hat: 8 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 91.1091.10Patch availableCNA
  • Thunderbird VendorMozilla Affected before 91.10 Fixed in 91.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.10VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.10 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.10

Red Hat 6 advisories

  • RHSA-2022:4890 Released 2022-06-03 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.10.0-1.el8_2
  • RHSA-2022:4892 Released 2022-06-03 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-91.10.0-1.el9_0
  • RHSA-2022:4887 Released 2022-06-03 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.10.0-1.el8_6
Show 3 more Red Hat advisories
  • RHSA-2022:4888 Released 2022-06-03 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.10.0-1.el8_1
  • RHSA-2022:4891 Released 2022-06-03 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.10.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.10.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.10.0-1.el7_9
  • RHSA-2022:4889 Released 2022-06-02 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.10.0-1.el8_4

Fixed in the same release

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

  • Release ·

    Mozilla Thunderbird 91.10

    9 records Highest priority Priority HIGH 2 HIGH, 6 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
    • TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-13638 Observable discrepancy in Mozilla ThunderbirdPriority MEDIUM 62
    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-2022:4887
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:4892
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:4888
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:4890
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:4889
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:4891
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:4891
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:4891

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-1834
  2. 2026-10-03 Alias added: GHSA-qq6h-hx9q-4fxv

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