CVE-2019-11706

libical: Type confusion in icaltimezone_get_vtimezone_properties function in icalproperty.c

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Severity

Moderate

Red Hat Product Security

7.4

CVSS 3.0

Review impact separately from score.

Published · June 13, 2019

Updated · November 22, 2025

Description

A flaw in Thunderbird's implementation of iCal causes a type confusion in icaltimezone_get_vtimezone_properties when processing certain email messages, resulting in a crash. This vulnerability affects Thunderbird < 60.7.1.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Thunderbird can be configured to use icaljs instead of libical by setting calendar.icaljs = true in preferences, mitigating this vulnerability.

CVSS / CWE

CVSS 3.0 · 7.4
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')