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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

2017-06-19T16:29:00.497

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 6.5 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

4.9

Weaknesses

Type: Primary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	openbsd	openbsd	≤ 6.1	Yes

References

http://www.securityfocus.com/bid/99177 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1039427 ([email protected])
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 ([email protected])
https://support.apple.com/HT208112 ([email protected])
https://support.apple.com/HT208113 ([email protected])
https://support.apple.com/HT208115 ([email protected])
https://support.apple.com/HT208144 ([email protected])
https://www.exploit-db.com/exploits/42271/ ([email protected])
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/99177 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039427 (af854a3a-2127-422b-91ae-364da2661108)
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 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208112 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208113 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208115 (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/HT208144 (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/42271/ (af854a3a-2127-422b-91ae-364da2661108)
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)