Bug ID 494098: PAC file download mechanism race condition

Last Modified: Oct 16, 2023

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

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.0 HF4, 11.5.3, 11.4.1 HF9

Opened: Dec 03, 2014

Severity: 2-Critical

Related Article: K16857

Symptoms

PAC file download mechanism might encounter a race condition if /etc/hosts is patched with the static entry of the host that contains PAC file.

Impact

Proxy PAC file fails to download.

Conditions

The /etc/hosts is patched with the static entry of the host that contains PAC file.

Workaround

Add delay in proxy PAC file download to avoid race condition.

Fix Information

PAC file download mechanism now avoids a race condition if /etc/hosts is patched with the static entry of the host that contains PAC file.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips