CVE-2021-1379
Multiple vulnerabilities in the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) implementations for Cisco IP Phone Series 68xx/78xx…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Ip Conference Phone 7832 Firmware | before 12.8\(1\) Version 12.8\(1\) |
| Cisco | Ip Conference Phone 7832 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Conference Phone 8832 Firmware | before 12.8\(1\) Version 12.8\(1\) |
| Cisco | Ip Conference Phone 8832 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 6821 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 6841 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 6851 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 6861 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 6871 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 7811 Firmware | before 12.8\(1\) Version 12.8\(1\) |
| Cisco | Ip Phone 7811 With Multiplatform Firmware | before 11.3\(2\) |
| Cisco | Ip Phone 7821 Firmware | before 12.8\(1\) Version 12.8\(1\) |