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CVE-2019-11704

CriticalPublished

A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email messages,...

Published: Jul 23, 2019
Updated: Aug 4, 2024
Assigning CNA: mozilla
Evidence observed: Jun 17, 2019

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

10.5%

Moderate · next 30 days

Percentile: 95.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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

Sources

Thunderbird ESR < 60.7.XXX - 'icalmemorystrdupanddequote' Heap-Based Buffer OverflowExploit
X41 D-Sec GmbH · multiple · Jun 17, 2019

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