Exim < 4.76 dkim_exim_verify_finish() DKIM-Signature Header Format String

This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.

Synopsis :

The remote mail server is potentially affected by a format string

Description :

Based on its response to a specially formatted mail message, the Exim
mail server listening on this port appears to be affected by a format
string vulnerability.

Specifically, the 'dkim_exim_verify_finish()' function fails to
properly sanitize format string specifiers in the DKIM-Signature
header. By sending a specially crafted email, a remote attacker could
potentially execute arbitrary code as the Exim run-time user.

See also :


Solution :

Upgrade to Exim 4.76 or later.

Risk factor :

High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.5
Public Exploit Available : false

Family: SMTP problems

Nessus Plugin ID: 53856 ()

Bugtraq ID: 47736

CVE ID: CVE-2011-1407