PT-2018-17003 · F5 · F5 Big-Ip

Published 2018-03-22 · Updated 2018-04-20 · CVE-2018-5509

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions 12.1.0 through 12.1.3.1 F5 BIG-IP version 13.0.0

Description The issue occurs when a specifically configured virtual server receives traffic of an undisclosed nature, causing TMM to crash and potentially leading to a denial of service. This configuration is not common and does not work when enabled in previous versions of BIG-IP. The crash happens when the configuration is enabled and the virtual server receives non-TCP traffic, starting from version 12.1.0. The fix includes additional configuration validation logic to prevent this configuration from being applied to a virtual server. There is only data plane exposure with a non-standard configuration, and no control plane exposure.

Recommendations For F5 BIG-IP versions 12.1.0 through 12.1.3.1, update to a version that includes the fix for this issue to prevent TMM from crashing when receiving non-TCP traffic with the specific configuration. For F5 BIG-IP version 13.0.0, update to a version that includes the fix for this issue to prevent TMM from crashing when receiving non-TCP traffic with the specific configuration. As a temporary workaround, consider disabling the non-standard configuration that exposes this issue until a patch is available.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2018-5509

Affected Products

F5 Big-Ip

References · 5

• https://support.f5.com/csp/article/K49440608 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-5509 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-5509 · Security Note
• http://securitytracker.com/id/1040562 · Note
• http://securityfocus.com/bid/103504 · Note