CVE-2017-1000378

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-06-19 · updated 2026-06-17
Weakness: CWE-400

Description

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.

Affected products

Netbsd: through 7.1

References

http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markup
http://www.securityfocus.com/bid/99255
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markup
http://www.securityfocus.com/bid/99255
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

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