CVE-2018-6552: Apport treats the container PID as the global PID when /proc/<global_pid>/ is missing
First published: Thu May 31 2018(Updated: )
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.
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apport Project Apport | =2.14.1 | |
| Canonical Ubuntu Linux | =14.04 | |
| Apport Project Apport | =2.20.9 | |
| Canonical Ubuntu Linux | =18.04 | |
| Apport Project Apport | =2.20.7 | |
| Canonical Ubuntu Linux | =17.10 | |
| Apport Project Apport | =2.20.1 | |
| Canonical Ubuntu Linux | =16.04 | |
| All of | ||
| Apport Project Apport | =2.14.1 | |
| Canonical Ubuntu Linux | =14.04 | |
| All of | ||
| Apport Project Apport | =2.20.9 | |
| Canonical Ubuntu Linux | =18.04 | |
| All of | ||
| Apport Project Apport | =2.20.7 | |
| Canonical Ubuntu Linux | =17.10 | |
| All of | ||
| Apport Project Apport | =2.20.1 | |
| Canonical Ubuntu Linux | =16.04 |
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Reference Links
- https://usn.ubuntu.com/3664-2/
- https://usn.ubuntu.com/usn/usn-3664-1
- https://launchpad.net/bugs/cve/CVE-2018-6552
- https://security-tracker.debian.org/tracker/CVE-2018-6552
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6552
- https://nvd.nist.gov/vuln/detail/CVE-2018-6552
- https://ubuntu.com/security/CVE-2018-6552
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/security-tracker-debian
- source/Debian
- agent/author
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/severity
- agent/description
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- agent/references
- agent/tags
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- collector/usn-cve
- source/Ubuntu
- vendor/apport project
- canonical/apport project apport
- version/apport project apport/2.14.1
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/apport project apport/2.20.9
- version/canonical ubuntu linux/18.04
- version/apport project apport/2.20.7
- version/canonical ubuntu linux/17.10
- version/apport project apport/2.20.1
- version/canonical ubuntu linux/16.04