CVE-2006-4924

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    CVE-2006-4924

    Published: 27 Sept 2006Last Modified: 10 Apr 2026

    Summary:

    Details: sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.

    References: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:22.openssh.asc, ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc, http://secunia.com/advisories/21923, http://secunia.com/advisories/22091, http://secunia.com/advisories/22116, http://secunia.com/advisories/22158, http://secunia.com/advisories/22164, http://secunia.com/advisories/22183, http://secunia.com/advisories/22196, http://secunia.com/advisories/22208, http://secunia.com/advisories/22236, http://secunia.com/advisories/22245, http://secunia.com/advisories/22270, http://secunia.com/advisories/22298, http://secunia.com/advisories/22352, http://secunia.com/advisories/22362, http://secunia.com/advisories/22487, http://secunia.com/advisories/22495, http://secunia.com/advisories/22823, http://secunia.com/advisories/22926, http://secunia.com/advisories/23038, http://secunia.com/advisories/23241, http://secunia.com/advisories/23340, http://secunia.com/advisories/23680, http://secunia.com/advisories/24479, http://secunia.com/advisories/24799, http://secunia.com/advisories/24805, http://secunia.com/advisories/25608, http://secunia.com/advisories/29371, http://secunia.com/advisories/34274, http://security.freebsd.org/advisories/FreeBSD-SA-06%3A22.openssh.asc, http://security.gentoo.org/glsa/glsa-200609-17.xml, http://security.gentoo.org/glsa/glsa-200611-06.xml, http://www.mandriva.com/security/advisories?name=MDKSA-2006:179, http://www.novell.com/linux/security/advisories/2006_24_sr.html, http://www.novell.com/linux/security/advisories/2006_62_openssh.html, http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html, http://www.ubuntu.com/usn/usn-355-1, http://www.vupen.com/english/advisories/2006/3777, http://www.vupen.com/english/advisories/2006/4401, http://www.vupen.com/english/advisories/2006/4869, http://www.vupen.com/english/advisories/2007/0930, http://www.vupen.com/english/advisories/2007/1332, http://www.vupen.com/english/advisories/2007/2119, http://www.vupen.com/english/advisories/2009/0740, https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207955, https://hypersonic.bluecoat.com/support/securityadvisories/ssh_server_on_sg, http://blogs.sun.com/security/entry/sun_alert_102962_security_vulnerability, http://www.securityfocus.com/bid/20216, http://www.debian.org/security/2006/dsa-1189, http://www.debian.org/security/2006/dsa-1212, http://www.securityfocus.com/bid/20216, https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207955, ftp://ftp.sco.com/pub/unixware7/714/security/p534336/p534336.txt, http://bugs.gentoo.org/show_bug.cgi?id=148228, http://docs.info.apple.com/article.html?artnum=305214, http://itrc.hp.com/service/cki/docDisplay.do?docId=c00815112, http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html, http://marc.info/?l=openssh-unix-dev&m=115939141729160&w=2, http://securitytracker.com/id?1016931, http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.592566, http://sourceforge.net/forum/forum.php?forum_id=681763, http://sourceforge.net/project/shownotes.php?release_id=461863&group_id=69227, http://sunsolve.sun.com/search/document.do?assetkey=1-26-102962-1, http://support.avaya.com/elmodocs2/security/ASA-2006-216.htm, http://support.avaya.com/elmodocs2/security/ASA-2006-262.htm, http://www-unix.globus.org/mail_archive/security-announce/2007/04/msg00000.html, http://www.kb.cert.org/vuls/id/787448, http://www.openbsd.org/errata.html#ssh, http://www.osvdb.org/29152, http://www.redhat.com/support/errata/RHSA-2006-0697.html, http://www.redhat.com/support/errata/RHSA-2006-0698.html, http://www.securityfocus.com/archive/1/447153/100/0/threaded, http://www.trustix.org/errata/2006/0054, http://www.us-cert.gov/cas/techalerts/TA07-072A.html, http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html, http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html, https://exchange.xforce.ibmcloud.com/vulnerabilities/29158, https://issues.rpath.com/browse/RPL-661, https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10462, https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1193

    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