Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apport Project | Apport | 2.14.1 |
| Canonical | Ubuntu Linux | 14.04 |
References
- https://usn.ubuntu.com/3664-2/Vendor Advisory
- https://usn.ubuntu.com/usn/usn-3664-1Vendor Advisory
- https://usn.ubuntu.com/3664-2/Vendor Advisory
- https://usn.ubuntu.com/usn/usn-3664-1Vendor Advisory
FAQ
What is CVE-2018-6552?
CVE-2018-6552 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 resour...
How severe is CVE-2018-6552?
CVE-2018-6552 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-6552?
Check the references section above for vendor advisories and patch information. Affected products include: Apport Project Apport, Canonical Ubuntu Linux.