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    CVE-2017-1000373

    The OpenBSD qsort() function is recursive, and not randomized, an attacker can construct a pathological input array of N elements that causes qsort() to deterministically recurse N/4 times. This allows attackers to consume arbitrary amounts of stack memory and manipulate stack memory to assist in arbitrary code execution attacks. This affects OpenBSD 6.1 and possibly earlier versions.

    Published:Jun 19, 2017
    Last Modified:Apr 20, 2025
    EPS:Jun 19, 2017
    EPSS Score:0.18
    CVSS Score:6.5

    Affected Products

    Vendor
    Openbsd
    Product
    Openbsd

    Exploits

    https://www.exploit-db.com/exploits/42271

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    References

    http://www.securityfocus.com/bid/99177
    http://www.securitytracker.com/id/1039427
    https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/qsort.c?rev=1.15&content-type=text/x-cvsweb-markup
    https://support.apple.com/HT208112
    https://support.apple.com/HT208113
    https://support.apple.com/HT208115
    https://support.apple.com/HT208144
    https://www.exploit-db.com/exploits/42271/
    https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
    http://www.securityfocus.com/bid/99177
    http://www.securitytracker.com/id/1039427
    https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/qsort.c?rev=1.15&content-type=text/x-cvsweb-markup
    https://support.apple.com/HT208112
    https://support.apple.com/HT208113
    https://support.apple.com/HT208115
    https://support.apple.com/HT208144
    https://www.exploit-db.com/exploits/42271/
    https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

    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