Skip to main content

Uncontrolled Resource Consumption

CVE-2022-45873

Medium
5.5/10

Summary

systemd versions 250-rc1 through 252-rc2 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.

  • LOW
  • LOCAL
  • NONE
  • UNCHANGED
  • NONE
  • LOW
  • NONE
  • HIGH

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

References

Advisory Timeline

  • Published