Bug ID 528739: DNS Cache might use cached data from ADDITIONAL sections in ANSWER responses.

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
11.2.0, 11.2.1, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 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, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8

Fixed In:
12.0.0, 11.6.1, 11.5.4, 11.4.1 HF10, 11.2.1 HF16

Opened: Jun 18, 2015
Severity: 2-Critical
Related Article:
K47320953

Symptoms

DNS Caching might use cached data from ADDITIONAL sections of previous lookups in the ANSWER section of responses.

Impact

The data from the ADDITIONAL section might be used in the ANSWER section of DNS responses. The data might be stale or incorrect.

Conditions

This occurs when using DNS Caching.

Workaround

None.

Fix Information

The DNS Cache now correctly ignores data from the ADDITIONAL section when constructing the ANSWER section.

Behavior Change