CVE-2017-1000373 Denial of service in n/a
Attackers can cause stack exhaustion and potentially execute code by providing pathological input to the recursive OpenBSD qsort function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-1000373?
CVE-2017-1000373 is a medium-severity denial of service vulnerability in Openbsd Openbsd, published on 19 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2017-1000373?
It affects 1 product.
Products include Openbsd Openbsd.
How do I fix CVE-2017-1000373?
No fix has been published for CVE-2017-1000373 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-1000373 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-1000373 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as GHSA-wcg9-65qx-c5vj.