Debian Security Advisory

DSA-363-1 postfix -- denial of service, bounce-scanning

Date Reported:
03 Aug 2003
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2003-0468, CVE-2003-0540.
More information:

The postfix mail transport agent in Debian 3.0 contains two vulnerabilities:

  • CAN-2003-0468: Postfix would allow an attacker to bounce-scan private networks or use the daemon as a DDoS tool by forcing the daemon to connect to an arbitrary service at an arbitrary IP address and either receiving a bounce message or observing queue operations to infer the status of the delivery attempt.
  • CAN-2003-0540: a malformed envelope address can 1) cause the queue manager to lock up until an entry is removed from the queue and 2) lock up the smtp listener leading to a denial of service.

For the current stable distribution (woody) these problems have been fixed in version 1.1.11-0.woody3.

For the unstable distribution (sid) these problems will be fixed soon.

We recommend that you update your postfix package.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Architecture-independent component:
Intel IA-32:
Intel IA-64:
Motorola 680x0:
Big endian MIPS:
Little endian MIPS:
IBM S/390:
Sun Sparc:

MD5 checksums of the listed files are available in the original advisory.