Vulnerability Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | >= 6.6.0, < 6.6.12 |
| Cisco | Asr 9000V | - |
| Cisco | Asr 9001 | - |
| Cisco | Asr 9006 | - |
| Cisco | Asr 9010 | - |
| Cisco | Asr 9901 | - |
| Cisco | Asr 9904 | - |
| Cisco | Asr 9906 | - |
| Cisco | Asr 9910 | - |
| Cisco | Asr 9912 | - |
| Cisco | Asr 9922 | - |
| Cisco | Ncs 540-12Z20G-Sys-A | - |
| Cisco | Ncs 540-12Z20G-Sys-D | - |
| Cisco | Ncs 540-24Z8Q2C-Sys | - |
| Cisco | Ncs 540-28Z4C-Sys-A | - |
| Cisco | Ncs 540-28Z4C-Sys-D | - |
| Cisco | Ncs 540-Acc-Sys | - |
| Cisco | Ncs 540X-12Z16G-Sys-A | - |
| Cisco | Ncs 540X-12Z16G-Sys-D | - |
| Cisco | Ncs 540X-16Z4G8Q2C-A | - |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-US Government Resource
FAQ
What is CVE-2020-3118?
CVE-2020-3118 is a vulnerability with a CVSS score of 8.8 (HIGH). A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected de...
How severe is CVE-2020-3118?
CVE-2020-3118 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-3118?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xr, Cisco Asr 9000V, Cisco Asr 9001, Cisco Asr 9006, Cisco Asr 9010.