CVE-2023-1981 Denial of service in avahi
Medium 5.5
Published
Updated
Check this codebase for CVE-2023-1981 and fix it if it is affected.
What it is: CVE-2023-1981 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1981 in the wild and no public exploit code.
Affected product: Fedoraproject Fedora. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-1981/ (Markdown: https://insights.sbomify.com/CVE-2023-1981/index.md)
An unprivileged user can crash the Avahi daemon via a D-Bus call, causing a denial of service for network discovery services.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-1981?
CVE-2023-1981 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 May 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 the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the avahi daemon to crash.
Weakness: CWE-400
Which versions are affected by CVE-2023-1981?
It affects 3 products.
Linux distribution packages (40)
avahi AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-autoipd AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-compat-howl AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-compat-howl-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-compat-libdns_sd AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-compat-libdns_sd-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-glib AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-glib-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-gobject AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-gobject-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-libs AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-tools AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-ui AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-ui-devel AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-ui-gtk3 AlmaLinux:8 | All versions | 0.7-21.el8 |
python3-avahi AlmaLinux:8 | All versions | 0.7-21.el8 |
avahi-autoipd-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-compat-howl-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-compat-libdns_sd-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-dnsconfd-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-glib-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-gobject-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-tools Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-tools-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-ui-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-ui-gtk3 Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi-ui-gtk3-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:0.7-21.el8 |
avahi Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-autoipd Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-autoipd-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-compat-howl-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-compat-libdns_sd-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-dnsconfd-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
avahi-glib Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7-21.el8 |
Products include Avahi Avahi, Fedoraproject Fedora, Redhat Enterprise Linux.
How do I fix CVE-2023-1981?
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-2023-1981 being exploited?
There is no known exploitation of CVE-2023-1981 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2023-1981, ALSA-2023:7190, AZL-26789, AZL-34554, BELL-CVE-2023-1981, DEBIAN-CVE-2023-1981 and 13 more.