The BIG-IP Phone Home and ASM Call Home automatic signature update functionality is susceptible to Man-in-the-Middle type attacks due to improper validation of server SSL certificates. (CVE-2014-9326)
support.f5.com/kb/en-us/solutions/public/10000/000/sol10025.html
support.f5.com/kb/en-us/solutions/public/10000/300/sol10322.html
support.f5.com/kb/en-us/solutions/public/12000/700/sol12766.html
support.f5.com/kb/en-us/solutions/public/3000/400/sol3430.html
support.f5.com/kb/en-us/solutions/public/4000/900/sol4918.html
support.f5.com/kb/en-us/solutions/public/6000/600/sol6664.html
support.f5.com/kb/en-us/solutions/public/9000/500/sol9502.html
support.f5.com/kb/en-us/solutions/public/9000/900/sol9957.html
support.f5.com/kb/en-us/solutions/public/9000/900/sol9970.html