CVE-2023-38473 Reachable assertion in avahi_alternative_host_name
A reachable assertion in Avahi's hostname handling allows attackers to cause a denial of service by triggering a crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-38473?
CVE-2023-38473 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 2 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function.
Weakness: CWE-617
Which versions are affected by CVE-2023-38473?
It affects 2 products.
Linux distribution packages (8)
avahi SUSE:Linux Enterprise Server 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi-glib2 SUSE:Linux Enterprise Server 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi-glib2 SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi-glib2 SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi-glib2 SUSE:Linux Enterprise Workstation Extension 12 SP5 | All versions | 0.6.32-32.21.1 |
avahi openSUSE:Tumbleweed | All versions | 0.8-26.1 |
Products include Avahi Avahi, Redhat Enterprise Linux.
How do I fix CVE-2023-38473?
Apply the vendor's patch.
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-2023-38473 being exploited?
There is no known exploitation of CVE-2023-38473 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
Sources
Also known as ALPINE-CVE-2023-38473, AZL-31757, AZL-34553, BELL-CVE-2023-38473, CLEANSTART-2026-HQ46365, DEBIAN-CVE-2023-38473 and 6 more.