Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4
Fixed In:
11.6.0, 11.5.1 HF5, 11.4.1 HF9, 11.2.1 HF11
Opened: Apr 13, 2014 Severity: 2-Critical Related Article:
K15505
When using the DNS:name iRule to modify the RR owner name of a DNS message, TMM may crash if the new owner name passed from the iRule is not a valid domain name or the BIG-IP is processing high volume of traffic and under memory pressure.
Traffic disrupted while tmm restarts.
When using iRule to modify the RR owner name of a DNS message, and one of the following conditions satisfies: (a) The new domain name passed in from iRule is an invalid domain name. (b) BIG-IP is short of memory and memory allocation failure happens when creating a new RDF.
Use a valid domain name in the iRule.
After the fix, if the domain name in the iRule is invalid or memory allocation failure happens when modifying the RR owner name using the DNS:name iRule, TMM will not crash.