Heap-based buffer overflow in Mozilla Thunderbird - CVE-2019-11703

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Main Vulnerability Database Vulnerabilities #VU18797

Heap-based buffer overflow in Mozilla Thunderbird - CVE-2019-11703

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


Vulnerability identifier: #VU18797
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11703
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the iCal implementation in parser_get_next_char function in icalparser.c. A remote attacker can send a specially crafted email, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


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-2019-11703

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