CVE-2020-13529 Denial of service in Systemd
Medium 6.1
Published
Updated
Check this codebase for CVE-2020-13529 and fix it if it is affected.
What it is: CVE-2020-13529 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 10 May 2021. 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-2020-13529 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-2020-13529/ (Markdown: https://insights.sbomify.com/CVE-2020-13529/index.md)
An attacker can cause a denial of service in Systemd's DHCP client by spoofing DHCP FORCERENEW and ACK packets to reconfigure the server.
- 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-2020-13529?
CVE-2020-13529 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 10 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.
Weakness: CWE-290
Which versions are affected by CVE-2020-13529?
It affects 4 products.
Linux distribution packages (40)
NetworkManager-cloud-setup AlmaLinux:8 | All versions | 1:1.32.10-4.el8 |
NetworkManager-libnm-devel AlmaLinux:8 | All versions | 1:1.32.10-4.el8 |
NetworkManager-adsl-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-bluetooth-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-cloud-setup Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-cloud-setup-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-libnm-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-ovs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-ppp-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-team-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-tui-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-wifi-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager-wwan-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:1.32.10-4.el8 |
NetworkManager Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-adsl Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-adsl-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-bluetooth Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-bluetooth-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-cloud-setup-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-config-connectivity-redhat Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-config-server Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-dispatcher-routing-rules Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-libnm Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-libnm-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-ovs Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-ovs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-ppp Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-ppp-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-team Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-team-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-tui Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-tui-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-wifi Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-wifi-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-wwan Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
NetworkManager-wwan-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 1:1.32.10-4.el8 |
Products include Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Systemd Project Systemd.
How do I fix CVE-2020-13529?
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-2020-13529 being exploited?
There is no known exploitation of CVE-2020-13529 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALSA-2021:4361, CLSA-2021-1635459240, DEBIAN-CVE-2020-13529, GHSA-44p7-qpr4-rgvf, OESA-2021-1319, RHSA-2021:4361 and 2 more.