CVE-2017-1000373

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

• OpenBSD - 'at Stack Clash' Local Privilege Escalation2017-06-28 · local · openbsd · Verified

Impact

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.

Affected products

Weakness classification

References

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