CVE-2018-5518

Severity

23%

Complexity

44%

Confidentiality

48%

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.

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.

CVSS 3.0 Base Score 5.4. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.3. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: medium. CVSS Vector: (AV:A/AC:M/Au:S/C:N/I:N/A:P).

Overview

Type

F5

First reported 6 years ago

2018-05-02 13:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

F5 Networks Big-IP Local Traffic Manager (LTM)

F5 Big-IP Application Acceleration Manager (AAM)

F5 Big-IP Advanced Firewall Manager (AFM)

F5 Big-IP Analytics

F5 Big-IP Access Policy Manager (APM)

F5 Big-IP Application Security Manager (ASM)

F5 Big-IP Edge Gateway

F5 Big-IP Global Traffic Manager (GTM)

F5 Big-IP Link Controller

F5 Big-IP Policy Enforcement Manager (PEM)

F5 Big-IP WebAccelerator

F5 Big-IP Domain Name System (DNS)

References

1040797

Third Party Advisory, VDB Entry

https://support.f5.com/csp/article/K03165684

Vendor Advisory

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