CVE-2023-27567 Denial of service in n/a
A crafted TCP packet can crash the OpenBSD kernel when a specific pf divert-to rule is configured, causing a denial of service.
- 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-2023-27567?
CVE-2023-27567 is a high-severity denial of service vulnerability in Openbsd Openbsd, published on 3 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.
Weakness: CWE-400
Which versions are affected by CVE-2023-27567?
It affects 1 product.
Products include Openbsd Openbsd.
How do I fix CVE-2023-27567?
No fix has been published for CVE-2023-27567 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-2023-27567 being exploited?
There is no known exploitation of CVE-2023-27567 in the wild and no public exploit code.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as GHSA-3v6w-73q2-w9pg.