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TI-2019-08766 Aliases CVE-2019-11705GHSA-jqv2-fc88-9266

Out-of-bounds write in Mozilla Thunderbird

Priority MEDIUM 54CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 8 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

A flaw in Thunderbird's implementation of iCal causes a stack buffer overflow in icalrecur_add_bydayrules when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.

Why it matters now

EPSS 0.09903 95th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 60.7.1Red Hat: 3 advisoriesRed Hat: 8 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 60.7.160.7.1Patch availableCNA
  • Thunderbird VendorMozilla Affected before 60.7.1 Fixed in 60.7.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.7.1VulnerableMozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.7.1 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.7.1

Red Hat 3 advisories

  • RHSA-2019:1626 Released 2019-06-27 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-60.7.2-2.el7_6
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.7.2-2.el7_6
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.7.2-2.el7_6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.7.2-2.el7_6
  • RHSA-2019:1624 Released 2019-06-27 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.7.2-2.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.7.2-2.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.7.2-2.el6_10
  • RHSA-2019:1623 Released 2019-06-27 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-60.7.2-2.el8_0

Fixed in the same release

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

  • Advisory ·

    Mozilla Thunderbird — GLSA-201908-20

    14 records Highest priority Priority MEDIUM 10 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-08765 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 55
    • TI-2019-08764 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 55
    • TI-2019-08789 A vulnerability exists where if a user opens a locally saved HTML file, this file can use…Priority MEDIUM 48
    Show all 14 records → Advisory →

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-2019:1623
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:1626
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:1624
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2019:1624
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:1626
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:1624
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:1626
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2019:1626
Not affected: 2 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11705
  2. 2026-10-03 Alias added: GHSA-jqv2-fc88-9266

References

Advisory 3

  • 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