PT-2018-12955 · F5 · F5 Big-Ip

Published 2018-10-10 · Updated 2019-10-03 · CVE-2018-15311

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions 11.5.1 through 11.5.6 F5 BIG-IP versions 11.6.0 through 11.6.3.2 F5 BIG-IP versions 12.1.0 through 12.1.3.5 F5 BIG-IP versions 13.0.0 through 13.1.0.5

Description The issue occurs when F5 BIG-IP processes specially crafted TCP traffic with the Large Receive Offload (LRO) feature enabled, causing TMM to crash and leading to a failover event. This issue is only exposed if LRO is enabled.

Recommendations For F5 BIG-IP versions 11.5.1 through 11.5.6, consider disabling the LRO feature to prevent TMM crashes. For F5 BIG-IP versions 11.6.0 through 11.6.3.2, consider disabling the LRO feature to prevent TMM crashes. For F5 BIG-IP versions 12.1.0 through 12.1.3.5, consider disabling the LRO feature to prevent TMM crashes. For F5 BIG-IP versions 13.0.0 through 13.1.0.5, consider disabling the LRO feature to prevent TMM crashes.

Fix

Related Identifiers

CVE-2018-15311

Affected Products

F5 Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2018-15311 · Security Note
• https://support.f5.com/csp/article/K07550539 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-15311 · Vendor Advisory