CVE-2011-1720

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    CVE-2011-1720

    Published: 13 May 2011Last Modified: 10 Apr 2026

    Summary:

    Details: The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.

    References: http://secunia.com/advisories/44500, http://security.gentoo.org/glsa/glsa-201206-33.xml, http://www.debian.org/security/2011/dsa-2233, http://www.mandriva.com/security/advisories?name=MDVSA-2011:090, http://www.postfix.org/CVE-2011-1720.html, http://www.postfix.org/announcements/postfix-2.8.3.html, http://www.ubuntu.com/usn/usn-1131-1, http://www.securityfocus.com/bid/47778, https://bugzilla.redhat.com/show_bug.cgi?id=699035, http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705, http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00002.html, http://securityreason.com/securityalert/8247, http://www.kb.cert.org/vuls/id/727230, http://www.mail-archive.com/postfix-announce%40postfix.org/msg00007.html, http://www.osvdb.org/72259, http://www.securityfocus.com/archive/1/517917/100/0/threaded, http://www.securitytracker.com/id?1025521, https://exchange.xforce.ibmcloud.com/vulnerabilities/67359

    Affected packages

    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