CVE-2018-0102 Use after free in Cisco NX-OS
An unauthenticated adjacent attacker can cause a denial of service on Cisco Nexus switches by triggering a double-free condition in the Pong tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-0102?
CVE-2018-0102 is a high-severity use after free vulnerability in Cisco Nx-Os, published on 18 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Pong tool of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software attempts to free the same area of memory twice. An attacker could exploit this vulnerability by sending a pong request to an affected device from a location on the network that causes the pong reply packet to egress both a FabricPath port and a non-FabricPath port. An exploit could allow the attacker to cause a dual or quad supervisor virtual port-channel (vPC) to reload. This vulnerability affects the following products when running Cisco NX-OS Software Release 7.2(1)D(1), 7.2(2)D1(1), or 7.2(2)D1(2) with both the Pong and FabricPath features enabled and the FabricPath port is actively monitored via a SPAN session: Cisco Nexus 7000 Series Switches and Cisco Nexus 7700 Series Switches. Cisco Bug IDs: CSCuv98660.
Which versions are affected by CVE-2018-0102?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2018-0102?
No fix has been published for CVE-2018-0102 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2018-0102 being exploited?
There is no known exploitation of CVE-2018-0102 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-c2jm-2fx3-h7g6.