Short Name |
SMTP:DOS:DOVECOT-NULL |
---|---|
Severity |
Major |
Recommended |
Yes |
Category |
SMTP |
Keywords |
Dovecot Submission-Login Service NULL Pointer Dereference |
Release Date |
2019/06/11 |
Update Number |
3179 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
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.
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.