F5 Networks BIG-IP : BIG-IP tmsh vulnerability (K01067037)
Medium Nessus Plugin ID 118615
SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionWhen BIG-IP is licensed for Appliance mode, Admin and Resource administrator roles can by-pass BIG-IP Appliance mode restrictions to overwrite critical system files. (CVE-2018-15321)
Attackers with ahigh-privilege level can overwrite critical system files, which in turnbypasses security controls thatlimit TMOS Shell ( tmsh ) commands.This scenario is possible when the Administrator orResource Administrator roles are granted tmsh access.Resource Administrator roles must have tmsh access to perform this attack.
Note : F5 does not consider the capability of Advanced Shell ( bash ) access in this vulnerability, as users granted that level of access can simply perform any command as root. This vulnerability is an issue for Appliance mode, users who are granted tmsh access, and for the Resource Administrator role when operating in standard, non-Appliance mode.
When the BIG-IP system is licensed for Appliance mode, Administrator and Resource Administrator roles can by-pass BIG-IP Appliance mode restrictions to overwrite critical system files.
SolutionUpgrade to one of the non-vulnerable versions listed in the F5 Solution K01067037.