Access Restriction Bypass Affecting lxc package, versions <2.0.5-0ubuntu4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1704-LXC-385872
- published1 May 2017
- disclosed1 May 2017
Introduced: 1 May 2017
CVE-2016-8649 (opens in a new tab)How to fix?
Upgrade Ubuntu:17.04 lxc to version 2.0.5-0ubuntu4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream lxc package and not the lxc package as distributed by Ubuntu.
See How to fix? for Ubuntu:17.04 relevant fixed versions and status.
lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's filesystem via the openat() family of syscalls.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-8649
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1639345
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845465
- https://security-tracker.debian.org/tracker/CVE-2016-8649
- https://github.com/lxc/lxc/commit/81f466d05f2a89cb4f122ef7f593ff3f279b165c
- https://bugzilla.redhat.com/show_bug.cgi?id=1398242
- http://www.securityfocus.com/bid/94498