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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 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.

    Published:Aug 3, 2003
    Last Modified:Apr 16, 2026
    EPS:Aug 5, 2003
    EPSS Score:0.57494
    CVSS Score:5

    Affected Products

    Vendor
    Conectiva
    Product
    Linux
    Vendor
    Redhat
    Product
    Linux
    Vendor
    Wietse Venema
    Product
    Postfix

    Exploits

    https://www.exploit-db.com/exploits/22981https://www.exploit-db.com/exploits/22982

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A544
    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
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A544

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High