SMTP: Dovecot Submission-Login Service NULL Pointer Dereference
This signature detects attempts to exploit a known vulnerability against Dovecot server. The vulnerability is due to a NULL pointer dereference in the submission-login service when authentication is aborted. A remote attacker could exploit this vulnerability by sending malicious requests to a targeted server. Successful exploitation will cause the Dovecot submission-login process to abnormally terminate. By repeatedly sending such crafted requests, the attacker may effect a partial denial-of-service.
Extended Description
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
Affected Products
Opensuse leap
References
CVE: CVE-2019-11494
Short Name
SMTP:DOS:DOVECOT-NULL
Severity
Major
Recommended
True
Recommended Action
None
Category
SMTP
Keywords
CVE-2019-11494 Dereference Dovecot NULL Pointer Service Submission-Login
Release Date
06/11/2019
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3590
False Positive
Unknown
Vendors
Opensuse
Dovecot
Fedoraproject
CVSS Score
5.0