CVE-2017-1000373 json
The OpenBSD qsort() function is recursive, and not randomized, an attacker can construct a pathological input array of N elements that caus…
published 2017-06-19 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-1532
- cvss
- 6.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 13.4%
- EPSS 13.4% chance of exploitation in 30 days, percentile 96%
- public exploits
- 1
- Exploit-DB
Summary
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.
Timeline
- Published
- First public exploit (EDB-42271)
Exploit prediction
13.38% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-42271 OpenBSD - 'at Stack Clash' Local Privilege Escalation local, 2017-06-28
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
exploit-db.com
/exploits/42271/
exploit
- support.apple.com /HT208144
-
qualys.com
/2017/06/19/stack-clash/stack-clash.txt
third-party-advisory
-
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
-
securityfocus.com
/bid/99177
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1039427
vdb-entry
- support.apple.com /HT208113
- support.apple.com /HT208112
- support.apple.com /HT208115
Sources
- CVE List CVE-2017-1000373
- NVD CVE-2017-1000373
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.