Logstash versions prior to 2.3.3, when using the Netflow Codec plugin, a remote attacker crafting malicious Netflow v5, Netflow v9 or IPFIX packets could perform a denial of service attack on the Logstash instance. The errors resulting from these crafted inputs are not handled by the codec and can cause the Logstash process to exit.
[
{
"product": "Logstash",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "before 2.3.3"
}
]
}
]