Vulnerability Description
A vulnerability in the Cisco IOS XE ROM Monitor (ROMMON) Software for Cisco 4000 Series Integrated Services Routers, Cisco ASR 920 Series Aggregation Services Routers, Cisco ASR 1000 Series Aggregation Services Routers, and Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, physical attacker to break the chain of trust and load a compromised software image on an affected device. The vulnerability is due to the presence of a debugging configuration option in the affected software. An attacker could exploit this vulnerability by connecting to an affected device through the console, forcing the device into ROMMON mode, and writing a malicious pattern using that specific option on the device. A successful exploit could allow the attacker to break the chain of trust and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xe Rom Monitor | < 16.2\(1r\) |
| Cisco | 4221 Integrated Services Router | - |
| Cisco | 4331 Integrated Services Router | - |
| Cisco | 4431 Integrated Services Router | - |
| Cisco | 4461 Integrated Services Router | - |
| Cisco | Asr-920-10Sz-Pd | - |
| Cisco | Asr-920-12Cz-A | - |
| Cisco | Asr-920-12Cz-D | - |
| Cisco | Asr-920-12Sz-A | - |
| Cisco | Asr-920-12Sz-D | - |
| Cisco | Asr-920-20Sz-M | - |
| Cisco | Asr-920-24Sz-Im | - |
| Cisco | Asr-920-24Sz-M | - |
| Cisco | Asr-920-24Tz-M | - |
| Cisco | Asr-920-4Sz-A | - |
| Cisco | Asr-920-4Sz-D | - |
| Cisco | Asr 920U-12Sz-Im | - |
| Cisco | Asr 1000-X | - |
| Cisco | Asr 1001 | - |
| Cisco | Asr 1001-X | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rVendor Advisory
FAQ
What is CVE-2020-3524?
CVE-2020-3524 is a vulnerability with a CVSS score of 6.8 (MEDIUM). A vulnerability in the Cisco IOS XE ROM Monitor (ROMMON) Software for Cisco 4000 Series Integrated Services Routers, Cisco ASR 920 Series Aggregation Services Routers, Cisco ASR 1000 Series Aggregatio...
How severe is CVE-2020-3524?
CVE-2020-3524 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-3524?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe Rom Monitor, Cisco 4221 Integrated Services Router, Cisco 4331 Integrated Services Router, Cisco 4431 Integrated Services Router, Cisco 4461 Integrated Services Router.