Type Confusion in Mozilla Thunderbird - CVE-2019-11706

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Main Vulnerability Database Vulnerabilities #VU18800

Type Confusion in Mozilla Thunderbird - CVE-2019-11706

Published: June 14, 2019 / Updated: June 17, 2021


Vulnerability identifier: #VU18800
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11706
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to a type confusion error within the iCal implementation in icaltimezone_get_vtimezone_properties function in icalproperty.c. A remote attacker can create a specially crafted email with malformed timezone data, trigger a type confusion error and crash the application.



Affected software

Mozilla Thunderbird
Arch Linux
Gentoo Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Slackware Linux
Opensuse
SUSE Package Hub for SUSE Linux Enterprise
thunderbird (Ubuntu package)
thunderbird (Debian package)

How to mitigate CVE-2019-11706

Install updates from vendor's website.

Mozilla Thunderbird - update to 60.7.1
thunderbird (Ubuntu package) - addressed in versions 1:60.7.1+build1-0ubuntu0.16.04.1, 1:60.7.1+build1-0ubuntu0.18.04.1, 1:60.7.1+build1-0ubuntu0.18.10.1, 1:60.7.1+build1-0ubuntu0.19.04.1
thunderbird (Debian package) - update to 1:60.7.1-1~deb9u1

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins