CVE-2022-45873

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory fedoraproject.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437 third party advisory patch
https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553 patch third party advisory issue tracking
https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497 patch third party advisory issue tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-45873?
CVE-2022-45873 has been scored as a medium severity vulnerability.
How to fix CVE-2022-45873?
To fix CVE-2022-45873, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-45873 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-45873 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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