PROTOCOL-VOIP -- Snort has detected traffic that may indicate the presence of the VOIP protocol or vulnerabilities in the VOIP protocol on the network.
PROTOCOL-VOIP Digium Asterisk multiple malformed Accept headers denial of service attempt
When processing a SUBSCRIBE request the res_pjsip_pubsub module stores the accepted formats present in the Accept headers of the request. This code did not limit the number of headers it processed despite having a fixed limit of 32. If more than 32 Accept headers were present the code would write outside of its memory and cause a crash.
This event is generated when an attempt to exploit CVE-2018-7284 is detected.
Public information/Proof of Concept available
No known false positives
Cisco Talos Intelligence Group
No rule groups
Denial of Service
Denial of Service attacks aim to make a server or program unresponsive for users. These attacks may be volume-based, to overwhelm the system, or they may use certain logical flaws in the software to cut the service off from the users. The attack may come from one or multiple sources. These attacks do not usually lead to a remote code execution. Volume based attacks are best handled using a firewall application.
CVE-2018-7284 |
Loading description |
Tactic: Impact
Technique: Network Denial of Service
For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org