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CVE-2003-0540

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…

Medium5.0EPSS 21.3%
Published
Updated
Reserved
Assigned by
mitre

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.

Scores

CVSS scores of CVE-2003-0540, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified2.0Medium5.0AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS (exploitation in 30 days)
21.3% · top 2.4% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

  • n/a

Affected products

  • n/a

    • affected n/a

References (13)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .