CVE-2022-20703

CVE Published	2022-02-10
Related CWE(s)	CWE-295: Improper Certificate Validation, CWE-121: Stack-based Buffer Overflow
Related Vendor(s)	cisco
Related Product(s)	rv160w_firmware, rv260p_firmware, rv345p_firmware, rv345_firmware, rv160_firmware, rv260w_firmware, rv260_firmware, rv340w_firmware, rv340_firmware
Exploitation Reported (CISA KEV)	2022-03-03
CVSS 3 Base Score	10.0 (CRITICAL)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Creating a Rogue Certification Authority Certificate (CAPEC-459)

An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.

Signature Spoofing by Improper Validation (CAPEC-475)

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

References

CVE-2022-20703

Cyber Threat Graph Context

Associated CAPEC Patterns

Creating a Rogue Certification Authority Certificate (CAPEC-459)

Signature Spoofing by Improper Validation (CAPEC-475)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities