On BIG-IP 11.5.1-11.6.4, iRules performing HTTP header manipulation may cause an interruption to service when processing traffic handled by a Virtual Server with an associated HTTP profile, in specific circumstances, when the requests do not strictly conform to RFCs.
[
{
"product": "BIG-IP",
"vendor": "F5",
"versions": [
{
"status": "affected",
"version": "BIG-IP 11.5.1-11.6.4"
}
]
}
]