CVE-2013-4421

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    CVE-2013-4421

    Published: 25 Oct 2013Last Modified: 16 Apr 2026

    Summary:

    Details: The buf_decompress function in packet.c in Dropbear SSH Server before 2013.59 allows remote attackers to cause a denial of service (memory consumption) via a compressed packet that has a large size when it is decompressed.

    References: http://lists.fedoraproject.org/pipermail/package-announce/2013-October/119300.html, http://lists.fedoraproject.org/pipermail/package-announce/2013-October/119323.html, http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html, http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html, http://secunia.com/advisories/55173, http://www.openwall.com/lists/oss-security/2013/10/11/4, http://www.securityfocus.com/bid/62958, https://matt.ucc.asn.au/dropbear/CHANGES, https://secure.ucc.asn.au/hg/dropbear/rev/0bf76f54de6f, https://support.citrix.com/article/CTX216642, http://www.openwall.com/lists/oss-security/2013/10/11/4, https://secure.ucc.asn.au/hg/dropbear/rev/0bf76f54de6f

    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
    CVE-2013-4421 | CVE-DB