Postfix epoll File Descriptor Leak Local DoS

low Nessus Plugin ID 34347
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The remote mail server is vulnerable to a local denial of service attack.


According to its banner, the version of Postfix running on the remote host leaks 'epoll' file descriptors when it executes non-Postfix commands from, say, a user's .forward file. A local attacker can access the leaked epoll descriptor to launch a denial of service attack against Postfix.

Note that this issue only affects hosts running Linux with a 2.6 kernel.


Upgrade to Postfix 2.4.9 / 2.5.5 / 2.6-20080902 or later.

See Also

Plugin Details

Severity: Low

ID: 34347

File Name: postfix_epoll_local_DoS.nasl

Version: 1.13

Type: remote

Published: 10/6/2008

Updated: 11/15/2018

Dependencies: smtpscan.nasl, smtpserver_detect.nasl, os_fingerprint.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:postfix:postfix

Required KB Items: Host/OS, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2008-3889

BID: 30977

CWE: 20