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Vulnerability record · CVE-2003-0468 · published 27 August 2003

CVE-2003-0468: Wietse venema postfix vulnerability

Wietse Venema · Postfix

Postfix 1.1.11 and earlier allows remote attackers to use Postfix to conduct "bounce scans" or DDos attacks of other hosts via an email address to the local host containing the target IP address and service name followed by a "!" string, which causes Postfix to attempt to use SMTP to communicate with the target on the associated port.

5.0 CVSS 2.0 Medium EPSS 2.4% · top 16.7%
5.0CVSS 2.0 base score
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
16 Jun 2026Last modified by NVD

Description

Postfix 1.1.11 and earlier allows remote attackers to use Postfix to conduct "bounce scans" or DDos attacks of other hosts via an email address to the local host containing the target IP address and service name followed by a "!" string, which causes Postfix to attempt to use SMTP to communicate with the target on the associated port.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000717
http://marc.info/?l=bugtraq&m=106001525130257&w=2
http://secunia.com/advisories/9433
http://www.debian.org/security/2003/dsa-363 PatchVendor Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2003:081
http://www.novell.com/linux/security/advisories/2003_033_postfix.html
http://www.redhat.com/support/errata/RHSA-2003-251.html
http://www.securityfocus.com/bid/8333
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A522
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000717
http://marc.info/?l=bugtraq&m=106001525130257&w=2
http://secunia.com/advisories/9433
http://www.debian.org/security/2003/dsa-363 PatchVendor Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2003:081
http://www.novell.com/linux/security/advisories/2003_033_postfix.html
http://www.redhat.com/support/errata/RHSA-2003-251.html
http://www.securityfocus.com/bid/8333
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A522

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Source: NIST National Vulnerability Database (record CVE-2003-0468), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.