Apport does not properly handle crashes originating from a PID namespace allowing local users to create certain files as root which an attacker could leverage to perform a denial of service via resource exhaustion, possibly gain root privileges, or escape from containers. The is_same_ns() function returns True when /proc/<global pid>/ does not exist in order to indicate that the crash should be handled in the global namespace rather than inside of a container. However, the portion of the data/apport code that decides whether or not to forward a crash to a container does not always replace sys.argv[1] with the value stored in the host_pid variable when /proc/<global pid>/ does not exist which results in the container pid being used in the global namespace. This flaw affects versions 2.20.8-0ubuntu4 through 2.20.9-0ubuntu7, 2.20.7-0ubuntu3.7, 2.20.7-0ubuntu3.8, 2.20.1-0ubuntu2.15 through 2.20.1-0ubuntu2.17, and 2.14.1-0ubuntu3.28.
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Affected Vendors & Products
References
History
No history.
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Status: PUBLISHED
Assigner: canonical
Published:
Updated: 2024-09-17T03:07:21.752Z
Reserved: 2018-02-02T00:00:00
Link: CVE-2018-6552
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Status : Modified
Published: 2018-05-31T22:29:00.207
Modified: 2024-11-21T04:10:53.427
Link: CVE-2018-6552
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