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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.12% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- netbsd/netbsd
- Source
- cve@mitre.org
References
- http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markupThird Party Advisory
- http://www.securityfocus.com/bid/99255Third Party Advisory, VDB Entry
- https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txtThird Party Advisory
- http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdlib/qsort.c?rev=1.23&content-type=text/x-cvsweb-markupThird Party Advisory
- http://www.securityfocus.com/bid/99255Third Party Advisory, VDB Entry
- https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txtThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.