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CVE-2003-0540

5.0 · MEDIUM

The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service (lock) via (1) a malformed envelope address to a local host that would generate a bounce a…

Published Aug 27, 2003wietse_venemaEPSS 21.26%

Overview

CVE-2003-0540 is a medium-severity vulnerability affecting wietse_venema postfix. It was published on August 27, 2003 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service (lock) via (1) a malformed envelope address to a local host that would generate a bounce and contains the ".!" string in the MAIL FROM or Errors-To headers, which causes nqmgr to lock up, or (2) via a valid MAIL FROM with a RCPT TO containing a ".!" string, which causes an instance of the SMTP listener to lock up.

Remediation

Check the references section for vendor advisories and patches from wietse_venema. Update postfix to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refdistro.conectiva.com.br/atualizacoes/?id=a&anuncio=000717Reflists.grok.org.uk/pipermail/full-disclosure/2003-August/007693.htmlRefmarc.info/?l=bugtraq&m=106001525130257&w=2Refmarc.info/?l=bugtraq&m=106029188614704&w=2Refsecunia.com/advisories/9433Refwww.debian.org/security/2003/dsa-363Refwww.kb.cert.org/vuls/id/895508Refwww.linuxsecurity.com/advisories/engarde_advisory-3517.htmlRefwww.mandriva.com/security/advisories?name=MDKSA-2003:081Refwww.novell.com/linux/security/advisories/2003_033_postfix.html

How CyberStrike helps

Frequently asked questions

What is CVE-2003-0540?

CVE-2003-0540 is a medium-severity vulnerability affecting wietse_venema postfix. It was published on August 27, 2003 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2003-0540?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2003-0540?

Check the references section for vendor advisories and patches from wietse_venema. Update postfix to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2003-0540?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2003-0540 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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