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Case File

CVE-2003-0540

MEDIUM · CVSS 5 EPSS 21.26%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2003-08-27 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2003-0540
Severity
MEDIUM
CVSS
5
EPSS
21.26%

Original NVD 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.