Vulnerability in Docker
CVE-2016-9962
RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain access to file-descriptors of these new processes during the initialization and can lead to container escapes or modification of runC state before the process is fully placed inside the container.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/95361 (VDB Entry, Third Party Advisory, vdb-entry)
- github.com/docker/docker/releases/tag/v1.12.6 (Vendor Advisory)
- rhn.redhat.com/errata/RHSA-2017-0116.html (vendor-advisory)
- seclists.org/fulldisclosure/2017/Jan/29 (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- bugzilla.suse.com/show_bug.cgi (Issue Tracking)
- security.gentoo.org/glsa/201701-34 (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0123.html (vendor-advisory)
- github.com/opencontainers/runc/commit/50a19c6ff828c58e5dab13830bd3dacde268afe5 (Patch, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0127.html (vendor-advisory)
Frequently asked questions
- What is CVE-2016-9962?
- CVE-2016-9962 is a medium-severity vulnerability in Docker, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.4/10. Published 2017-01-31.
- How severe is CVE-2016-9962?
- Medium severity. CVSS v3 base score is 6.4 out of 10.
- Is CVE-2016-9962 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.