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CVE-2017-1000373

Date: June 19, 2017

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.

Language: C

Severity Score

Related Resources (11)

http://www.securitytracker.com/id/1039427
https://support.apple.com/HT208112
https://support.apple.com/HT208113
https://nvd.nist.gov/vuln/detail/CVE-2017-1000373
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
https://support.apple.com/HT208115
https://support.apple.com/HT208144
http://www.securityfocus.com/bid/99177
https://www.exploit-db.com/exploits/42271/
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/qsort.c?rev=1.15&content-type=text/x-cvsweb-markup
https://www.mend.io/vulnerability-database/CVE-2017-1000373

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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