Bug ID 1020337: DNS msg_ObjType can cause buffer overrun due to lack of NUL terminator

Last Modified: Jan 25, 2022

Bug Tracker

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

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,

Opened: May 20, 2021
Severity: 3-Major


Tmm cores with umem debug enabled.


Tmm memory corruption. In some situations, tmm might crash. Traffic disrupted while tmm restarts.


A string operation is performed against DNS resource records (RRs) from DNSMSG::section in an iRule.


Do not use string operations against DNS RRs returned from DNSMSG::section.

Fix Information


Behavior Change