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CVE-2018-5518

5.4 · MEDIUM

On F5 BIG-IP 13.0.0-13.1.0.5 or 12.0.0-12.1.3.3, malicious root users with access to a VCMP guest can cause a disruption of service on adjacent VCMP guests running on the same host.

Published May 2, 2018EPSS 0.40%

Overview

CVE-2018-5518 is a medium-severity vulnerability. It was published on May 2, 2018 and has a CVSS 3.0 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

On F5 BIG-IP 13.0.0-13.1.0.5 or 12.0.0-12.1.3.3, malicious root users with access to a VCMP guest can cause a disruption of service on adjacent VCMP guests running on the same host. Exploiting this vulnerability causes the vCMPd process on the adjacent VCMP guest to restart and produce a core file. This issue is only exploitable on a VCMP guest which is operating in "host-only" or "bridged" mode. VCMP guests which are "isolated" are not impacted by this issue and do not provide mechanism to exploit the vulnerability. Guests which are deployed in "Appliance Mode" may be impacted however the exploit is not possible from an Appliance Mode guest. To exploit this vulnerability root access on a guest system deployed as "host-only" or "bridged" mode is required.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refwww.securitytracker.com/id/1040797Refsupport.f5.com/csp/article/K03165684Refwww.securitytracker.com/id/1040797Refsupport.f5.com/csp/article/K03165684

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5518?

CVE-2018-5518 is a medium-severity vulnerability. It was published on May 2, 2018 and has a CVSS 3.0 base score of 5.4 (MEDIUM).

How severe is CVE-2018-5518?

This vulnerability has a CVSS 3.0 base score of 5.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-5518?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2018-5518?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5518 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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