CVE-2023-52558 OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash
A remote attacker can crash the OpenBSD kernel by sending specially crafted network packets, 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-2023-52558?
CVE-2023-52558 is a high-severity denial of service vulnerability in Openbsd Openbsd, published on 1 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.
Weakness: CWE-131
Which versions are affected by CVE-2023-52558?
It affects 1 product.
Products include Openbsd Openbsd.
How do I fix CVE-2023-52558?
No fix has been published for CVE-2023-52558 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-2023-52558 being exploited?
There is no known exploitation of CVE-2023-52558 in the wild and no public exploit code.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as GHSA-4cg8-w873-pfqx.