OSVDB ID: 6551

Title: Postfix Bounce Scan / Packet Amplification DDoS

Info

Disclosure

Aug 03, 2003

Discovery

Unknown

Dates

Exploit

Aug 03, 2003

Solution

Unknown

Description

Postfix contains a design flaw which may allow an attacker to use the mail server in SMTP 'bounce' scanning or even DDoS attacks. A specially crafted recipient field can cause the mail server to connect and communicate with an arbitrary host/port.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation, Misconfiguration
Impact: Impact Unknown
Exploit: Exploit Public

Solution

Upgrade to version 1.1.12 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround: set append_dot_mydomain to "yes" and resolve_dequoted_address to "no".

Products

Wietse Venema

Postfix

1.1.0
1.1.1
1.1.10
1.1.11
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
1.1.9

References

Credit

  • Michal Zalewski - lcamtufghettot.org -


Direct URL: http://osvdb.org/6551