How severe is CVE-2003-0540?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 5 out of 10.

What type of vulnerability is CVE-2003-0540?

This is classified as NVD-CWE-Other, which is a common weakness in software security.

CVE-2003-0540 - MEDIUM Severity | CVSS 5

Vulnerability 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.

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