Bug ID 1016049: EDNS query with CSUBNET dropped by protocol inspection

Last Modified: Jun 10, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1

Opened: May 04, 2021
Severity: 4-Minor

Symptoms

EDNS query might be dropped by protocol inspection with an error log in /var/log/ltm similar to: info tmm[21575]: 23003139 SECURITYLOG Drop sip:192.168.0.0 sport:64869 dip:1.1.1.1 dport:53 query:test.f5.com qtype:malformed attack:malformed

Impact

Some queries might fail.

Conditions

Query containing CSUBNET option.

Workaround

None

Fix Information

None

Behavior Change