What’s Vulnerable › Vulnerabilities

CVE-2018-5518

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-05-02 · updated 2026-06-17

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.

Affected products

• F5 BIG-IP APM: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• BIG-IP: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Analytics: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Networks, Inc. BIG-IP (AAM): from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• BIG-IP ASM: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 BIG-IP DNS: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Edge Gateway: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Global Traffic Manager: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Link Controller: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 BIG-IP (LTM): from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Networks, Inc. BIG-IP (PEM): from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Webaccelerator: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0
• F5 Big-Ip Websafe: from 12.0.0 through 12.1.3; from 13.0.0 through 13.1.0

References

• http://www.securitytracker.com/id/1040797
• https://support.f5.com/csp/article/K03165684
• http://www.securitytracker.com/id/1040797
• https://support.f5.com/csp/article/K03165684

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