CVE-2017-3826 Denial of service in Cisco NetFlow Generation Appliance
Remote attackers can cause denial of service on Cisco NetFlow Generation Appliances by sending malformed SCTP packets to monitored data ports.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-3826?
CVE-2017-3826 is a high-severity denial of service vulnerability in Cisco NetFlow Generation Appliance, published on 1 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Stream Control Transmission Protocol (SCTP) decoder of the Cisco NetFlow Generation Appliance (NGA) with software before 1.1(1a) could allow an unauthenticated, remote attacker to cause the device to hang or unexpectedly reload, causing a denial of service (DoS) condition. The vulnerability is due to incomplete validation of SCTP packets being monitored on the NGA data ports. An attacker could exploit this vulnerability by sending malformed SCTP packets on a network that is monitored by an NGA data port. SCTP packets addressed to the IP address of the NGA itself will not trigger this vulnerability. An exploit could allow the attacker to cause the appliance to become unresponsive or reload, causing a DoS condition. User interaction could be needed to recover the device using the reboot command from the CLI. The following Cisco NetFlow Generation Appliances are vulnerable: NGA 3140, NGA 3240, NGA 3340. Cisco Bug IDs: CSCvc83320.
Which versions are affected by CVE-2017-3826?
It affects 1 product.
Products include Cisco Netflow Generation Appliance Software.
How do I fix CVE-2017-3826?
No fix has been published for CVE-2017-3826 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-3826 being exploited?
There is no known exploitation of CVE-2017-3826 in the wild and no public exploit code.
Sources
Also known as GHSA-6m6f-4vpp-rg9h.