CVE-2008-4109

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    CVE-2008-4109

    Published: 18 Sept 2008Last Modified: 10 Apr 2026

    Summary:

    Details: A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.

    References: http://secunia.com/advisories/31885, http://secunia.com/advisories/32080, http://secunia.com/advisories/32181, http://www.ubuntu.com/usn/usn-649-1, http://www.debian.org/security/2008/dsa-1638, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678, http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html, http://www.openwall.com/lists/oss-security/2024/07/01/3, http://www.securitytracker.com/id?1020891, https://exchange.xforce.ibmcloud.com/vulnerabilities/45202

    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-2008-4109 | CVE-DB