CVE-2021-1379 Memory corruption in Cisco IP Phones with Multiplatform Firmware
Unauthenticated adjacent attackers can execute code or cause denial of service on Cisco IP Phones via 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-2021-1379?
CVE-2021-1379 is a medium-severity memory corruption vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 18 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple vulnerabilities in the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) implementations for Cisco IP Phone Series 68xx/78xx/88xx could allow an unauthenticated, adjacent attacker to execute code remotely or cause a reload of an affected IP phone. These vulnerabilities are due to missing checks when the IP phone processes a Cisco Discovery Protocol or LLDP packet. An attacker could exploit these vulnerabilities by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted IP phone. A successful exploit could allow the attacker to execute code on the affected IP phone or cause it to reload unexpectedly, resulting in a denial of service (DoS) condition.Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
Weakness: CWE-120
Which versions are affected by CVE-2021-1379?
It affects 34 products.
Products include Cisco Ip Conference Phone 7832 Firmware, Cisco Ip Conference Phone 7832 With Multiplatform Firmware, Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Conference Phone 8832 With Multiplatform Firmware, Cisco Ip Phone 6821 With Multiplatform Firmware, Cisco Ip Phone 6841 With Multiplatform Firmware and 28 more.
How do I fix CVE-2021-1379?
No fix has been published for CVE-2021-1379 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-1379 being exploited?
There is no known exploitation of CVE-2021-1379 in the wild and no public exploit code.
Other vulnerabilities in Cisco IP Phones with Multiplatform Firmware
- 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-2019-1684 Denial of service in Cisco IP Phone 8800 Series Software
- 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-722m-4rr5-cvfh.