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.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 6.4 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

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

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Configurations

Configuration 1 (hide)

cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

Information

Published : 2017-06-19 09:29

Updated : 2017-10-23 18:29

NVD link : CVE-2017-1000373

Mitre link : CVE-2017-1000373

JSON object : View

CWE

CWE-400

Uncontrolled Resource Consumption

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Products Affected

openbsd

openbsd

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