CVE-2019-1963 Cisco FXOS and NX-OS Software Authenticated Simple Network Management Protocol Denial of Service Vulnerability
An authenticated remote attacker can cause a denial of service by sending crafted SNMP packets to Cisco FXOS and NX-OS devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1963?
CVE-2019-1963 is a high-severity denial of service vulnerability in Cisco Nx-Os, published on 28 Aug 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, remote attacker to cause the SNMP application on an affected device to restart unexpectedly. The vulnerability is due to improper validation of Abstract Syntax Notation One (ASN.1)-encoded variables in SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the SNMP daemon on the affected device. A successful exploit could allow the attacker to cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition.
Weakness: CWE-20
Which versions are affected by CVE-2019-1963?
It affects 2 products.
Products include Cisco Fx-Os, Cisco Nx-Os.
How do I fix CVE-2019-1963?
No fix has been published for CVE-2019-1963 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-2019-1963 being exploited?
There is no known exploitation of CVE-2019-1963 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-fc5g-gpmc-9m95.