Bug ID 514637: TMM crash in get_url_from_ssl_subject_cn

Last Modified: Mar 14, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5

Opened: Mar 26, 2015
Severity: 3-Major


When a category lookup agent is used in a per-request policy for SWG and it uses the subject.cn as an input, agent_category_lookup assumes that the subject always contains a CN. When a CN is not present in the subject, the parsing involved will dereference invalid memory and cause a crash.


Traffic disrupted while tmm restarts.


Access a server which has no CN in the subject.cn



Fix Information

Log and error out in category lookup when certificate subject does not contain a CN.

Behavior Change