CVE-2019-1684 Denial of service in Cisco IP Phone 8800 Series Software
An adjacent attacker can cause a temporary denial of service on Cisco IP phones by sending malicious CDP or LLDP packets.
- 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-2019-1684?
CVE-2019-1684 is a medium-severity denial of service vulnerability in Cisco IP Phone 8800 Series Software, published on 21 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Cisco Discovery Protocol or Link Layer Discovery Protocol (LLDP) implementation for the Cisco IP Phone 7800 and 8800 Series could allow an unauthenticated, adjacent attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to missing length validation of certain Cisco Discovery Protocol or LLDP packet header fields. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition. Versions prior to 12.6(1)MN80 are affected.
Which versions are affected by CVE-2019-1684?
It affects 14 products.
Products include Cisco Ip Conference Phone 7832 Firmware, Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Phone 7800 Firmware, Cisco Ip Phone 7811 Firmware, Cisco Ip Phone 7821 Firmware, Cisco Ip Phone 7841 Firmware and 8 more.
How do I fix CVE-2019-1684?
No fix has been published for CVE-2019-1684 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-2019-1684 being exploited?
There is no known exploitation of CVE-2019-1684 in the wild and no public exploit code.
Other vulnerabilities in Cisco IP Phone 8800 Series Software
- CVE-2020-3111 Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability
- CVE-2019-1635 Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability
- CVE-2021-1379 Memory corruption in Cisco IP Phones with Multiplatform Firmware
- CVE-2021-34711 Cisco IP Phone Software Arbitrary File Read Vulnerability
- CVE-2019-1922 Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability
Sources
Also known as GHSA-325p-cm4c-j6f9.