Undertow in Red Hat wildfly before version 11.0.0.Beta1 is vulnerable to a resource exhaustion resulting in a denial of service. Undertow keeps a cache of seen HTTP headers in persistent connections. It was found that this cache can easily exploited to fill memory with garbage, up to "max-headers" (default 200) * "max-header-size" (default 1MB) per active TCP connection.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "10.1.0"
},
{
"introduced": "0"
},
{
"last_affected": "11.0.0-alpha1"
}
]
}