CVE-2018-6556
3.3 · LOWOverview
CVE-2018-6556 is a low-severity vulnerability affecting canonical ubuntu_linux. It was published on August 10, 2018 and has a CVSS 3.0 base score of 3.3 (LOW).
This vulnerability has a CVSS 3.0 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.
Remediation
Check the references section for vendor advisories and patches from canonical. Update ubuntu_linux to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linuxcontainers | lxc | 2.0.0 | Affected |
References
Frequently Asked Questions
What is CVE-2018-6556?
CVE-2018-6556 is a low-severity vulnerability affecting canonical ubuntu_linux. It was published on August 10, 2018 and has a CVSS 3.0 base score of 3.3 (LOW).
How severe is CVE-2018-6556?
This vulnerability has a CVSS 3.0 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2018-6556?
Check the references section for vendor advisories and patches from canonical. Update ubuntu_linux to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-6556?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-6556 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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