Vulnerability identifier: #VU23598
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Dovecot
Server applications /
Mail servers
Vendor: Dovecot
Description
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.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Dovecot: 2.3.9 - 2.3.9.1
External links
http://github.com/dovecot/core/blob/2.3.9.1/NEWS
http://github.com/dovecot/core/commit/393a8cabf4dad893bf2ec60bf96cfde7a0c58432
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.