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.



Source: MITRE

Published: 2017-06-19

Updated: 2017-10-24

Type: CWE-400

Risk Information

CVSS v2.0

Base Score: 6.4

Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:P)

Impact Score: 4.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Impact Score: 2.5

Exploitability Score: 3.9

Severity: MEDIUM