Bug ID 1225857: Virtual server with FastL4 profile may drop connection when receives invalid RST packet from a client

Last Modified: Nov 21, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6

Opened: Jan 16, 2023

Severity: 4-Minor

Symptoms

If virtual server with FastL4 profile receives an RST packet with a sequence number outside of the receive window, it may drop the client side connection leaving server side intact resulting in server attempting to transmit more data.

Impact

Connection on the client side is dropped while server side becomes stale making server trying to transmit more data.

Conditions

- Virtual server with FastL4 profile. - Client sends RST packet with sequence number outside of receive window.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips