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CVE-2017-1000378

The NetBSD 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 NetBSD 7.1 and possibly earlier versions.

Published

2017-06-19T16:29:00.657

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 9.8 (CRITICAL)

CVSSv2 Vector

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

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

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	netbsd	netbsd	≤ 7.1	Yes

References

http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markup Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/99255 Third Party Advisory, VDB Entry ([email protected])
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt Third Party Advisory ([email protected])
http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markup Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/99255 Third Party Advisory, VDB Entry (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)