NULL pointer dereference in Dovecot - CVE-2019-11494
Published: May 6, 2019
Vulnerability identifier: #VU18399
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-11494
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Dovecot
Affected software:
Dovecot
Dovecot
Detailed vulnerability 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 within Submission-login when processing authentication. A remote attacker can unexpectedly abort the authentication process by disconnecting from the server during authentication and cause the software to crash.
How to mitigate CVE-2019-11494
Install updates from vendor's website.