NULL pointer dereference in Dovecot - CVE-2019-19722
Published: December 13, 2019 / Updated: December 13, 2019
Vulnerability identifier: #VU23598
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-19722
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when parsing group emails or empty values in From/To email fields in "src/plugins/push-notification/push-notification-event-message-common.c". A remote attacker can send an email with a group email address or an empty value in From or To fields and crash push notification drivers.
Affected software
Dovecot
dovecot (Alpine package)
dovecot
Fedora
dovecot (Alpine package)
dovecot
Fedora
How to mitigate CVE-2019-19722
Install updates from vendor's website.
Dovecot - update to 2.3.9.2
dovecot (Alpine package) - update to 2.3.9.2-r0
dovecot - addressed in versions 2.3.9.2-1.fc30, 2.3.9.2-1.fc31
dovecot (Alpine package) - update to 2.3.9.2-r0
dovecot - addressed in versions 2.3.9.2-1.fc30, 2.3.9.2-1.fc31