CVE-2022-45873 Denial of service in n/a

What is CVE-2022-45873?

CVE-2022-45873 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 23 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology is to crash a binary calling the same function recursively, and put it in a deeply nested directory to make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16 is set for the systemd/units/systemd-coredump.socket file.

Weakness: CWE-400

Which versions are affected by CVE-2022-45873?

It affects 2 products.

Products include Fedoraproject Fedora, Systemd Project Systemd.

How do I fix CVE-2022-45873?

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-2022-45873 being exploited?

There is no known exploitation of CVE-2022-45873 in the wild and no public exploit code.

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• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-11523, AZL-41470, DEBIAN-CVE-2022-45873, GHSA-3w8w-mhj7-j5rc.