CVE-2003-0540

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 21.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2003-08-27 · updated 2026-06-16

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.

Affected products

Conectiva Linux: 7.0, 8.0
Wietse Venema Postfix: 1.0.21, 1.1.11, 1.1.12, 1999-09-06, 1999-12-31, 2000-02-28 (+1)

References

http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000717
http://lists.grok.org.uk/pipermail/full-disclosure/2003-August/007693.html
http://marc.info/?l=bugtraq&m=106001525130257&w=2
http://marc.info/?l=bugtraq&m=106029188614704&w=2
http://secunia.com/advisories/9433
http://www.debian.org/security/2003/dsa-363
http://www.kb.cert.org/vuls/id/895508
http://www.linuxsecurity.com/advisories/engarde_advisory-3517.html
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

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