Vulnerabilities > CVE-2023-20107 - Insufficient Entropy vulnerability in Cisco Adaptive Security Appliance

CVSS 7.5 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

network

low complexity

cisco

CWE-331

NVD

Published: 2023-03-23

Updated: 2023-04-05

Summary

A vulnerability in the deterministic random bit generator (DRBG), also known as pseudorandom number generator (PRNG), in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco ASA 5506-X, ASA 5508-X, and ASA 5516-X Firewalls could allow an unauthenticated, remote attacker to cause a cryptographic collision, enabling the attacker to discover the private key of an affected device. This vulnerability is due to insufficient entropy in the DRBG for the affected hardware platforms when generating cryptographic keys. An attacker could exploit this vulnerability by generating a large number of cryptographic keys on an affected device and looking for collisions with target devices. A successful exploit could allow the attacker to impersonate an affected target device or to decrypt traffic secured by an affected key that is sent to or from an affected target device.

Vulnerable Configurations

Part	Description	Count
Application	Cisco Cisco Adaptive Security Appliance 9.1.7.4 Cisco Adaptive Security Appliance 9.2 Cisco Adaptive Security Appliance 9.2.4.8 Cisco Adaptive Security Appliance 9.3 Cisco Adaptive Security Appliance 9.3.3.9 Cisco Adaptive Security Appliance 9.4 Cisco Adaptive Security Appliance 9.4.2.11 Cisco Adaptive Security Appliance 9.4.4.37 Cisco Adaptive Security Appliance 9.5 Cisco Adaptive Security Appliance 9.5.2.5 Cisco Adaptive Security Appliance 9.6 Cisco Adaptive Security Appliance 9.6.0 Cisco Adaptive Security Appliance 9.6.1 Cisco Adaptive Security Appliance 9.6.1.3 Cisco Adaptive Security Appliance 9.6.1.5 Cisco Adaptive Security Appliance 9.6.1.10 Cisco Adaptive Security Appliance 9.6.2 Cisco Adaptive Security Appliance 9.6.2.1 Cisco Adaptive Security Appliance 9.6.2.2 Cisco Adaptive Security Appliance 9.6.2.3 Cisco Adaptive Security Appliance 9.6.2.7 Cisco Adaptive Security Appliance 9.6.2.11 Cisco Adaptive Security Appliance 9.6.2.13 Cisco Adaptive Security Appliance 9.6.2.22 Cisco Adaptive Security Appliance 9.6.2.23 Cisco Adaptive Security Appliance 9.6.3 Cisco Adaptive Security Appliance 9.6.3.1 Cisco Adaptive Security Appliance 9.6.3.3 Cisco Adaptive Security Appliance 9.6.3.8 Cisco Adaptive Security Appliance 9.6.3.9 Cisco Adaptive Security Appliance 9.6.3.11 Cisco Adaptive Security Appliance 9.6.3.12 Cisco Adaptive Security Appliance 9.6.3.14 Cisco Adaptive Security Appliance 9.6.3.17 Cisco Adaptive Security Appliance 9.6.3.20 Cisco Adaptive Security Appliance 9.6.4 Cisco Adaptive Security Appliance 9.6.4.3 Cisco Adaptive Security Appliance 9.6.4.5 Cisco Adaptive Security Appliance 9.6.4.6 Cisco Adaptive Security Appliance 9.6.4.8 Cisco Adaptive Security Appliance 9.6.4.10 Cisco Adaptive Security Appliance 9.6.4.12 Cisco Adaptive Security Appliance 9.6.4.14 Cisco Adaptive Security Appliance 9.6.4.17 Cisco Adaptive Security Appliance 9.6.4.18 Cisco Adaptive Security Appliance 9.6.4.20 Cisco Adaptive Security Appliance 9.6.4.22 Cisco Adaptive Security Appliance 9.6.4.23 Cisco Adaptive Security Appliance 9.6.4.24 Cisco Adaptive Security Appliance 9.6.4.25 Cisco Adaptive Security Appliance 9.6.4.29 Cisco Adaptive Security Appliance 9.6.4.30 Cisco Adaptive Security Appliance 9.6.4.31 Cisco Adaptive Security Appliance 9.6.4.34 Cisco Adaptive Security Appliance 9.6.4.35 Cisco Adaptive Security Appliance 9.6.4.36 Cisco Adaptive Security Appliance 9.6.4.40 Cisco Adaptive Security Appliance 9.6.4.41 Cisco Adaptive Security Appliance 9.6.4.42 Cisco Adaptive Security Appliance 9.6.4.43 Cisco Adaptive Security Appliance 9.6.4.45 Cisco Adaptive Security Appliance 9.7 Cisco Adaptive Security Appliance 9.7.1 Cisco Adaptive Security Appliance 9.7.1.2 Cisco Adaptive Security Appliance 9.7.1.4 Cisco Adaptive Security Appliance 9.7.1.8 Cisco Adaptive Security Appliance 9.7.1.15 Cisco Adaptive Security Appliance 9.7.1.16 Cisco Adaptive Security Appliance 9.7.1.21 Cisco Adaptive Security Appliance 9.7.1.24 Cisco Adaptive Security Appliance 9.8 Cisco Adaptive Security Appliance 9.8.0 Cisco Adaptive Security Appliance 9.8.1 Cisco Adaptive Security Appliance 9.8.1.5 Cisco Adaptive Security Appliance 9.8.1.7 Cisco Adaptive Security Appliance 9.8.2 Cisco Adaptive Security Appliance 9.8.2.8 Cisco Adaptive Security Appliance 9.8.2.14 Cisco Adaptive Security Appliance 9.8.2.15 Cisco Adaptive Security Appliance 9.8.2.17 Cisco Adaptive Security Appliance 9.8.2.20 Cisco Adaptive Security Appliance 9.8.2.24 Cisco Adaptive Security Appliance 9.8.2.26 Cisco Adaptive Security Appliance 9.8.2.28 Cisco Adaptive Security Appliance 9.8.2.33 Cisco Adaptive Security Appliance 9.8.2.35 Cisco Adaptive Security Appliance 9.8.2.38 Cisco Adaptive Security Appliance 9.8.2.45 Cisco Adaptive Security Appliance 9.8.3 Cisco Adaptive Security Appliance 9.8.3.8 Cisco Adaptive Security Appliance 9.8.3.11 Cisco Adaptive Security Appliance 9.8.3.14 Cisco Adaptive Security Appliance 9.8.3.16 Cisco Adaptive Security Appliance 9.8.3.18 Cisco Adaptive Security Appliance 9.8.3.21 Cisco Adaptive Security Appliance 9.8.3.26 Cisco Adaptive Security Appliance 9.8.3.29 Cisco Adaptive Security Appliance 9.8.4 Cisco Adaptive Security Appliance 9.8.4.3 Cisco Adaptive Security Appliance 9.8.4.7 Cisco Adaptive Security Appliance 9.8.4.8 Cisco Adaptive Security Appliance 9.8.4.9 Cisco Adaptive Security Appliance 9.8.4.10 Cisco Adaptive Security Appliance 9.8.4.12 Cisco Adaptive Security Appliance 9.8.4.15 Cisco Adaptive Security Appliance 9.8.4.17 Cisco Adaptive Security Appliance 9.8.4.20 Cisco Adaptive Security Appliance 9.8.4.22 Cisco Adaptive Security Appliance 9.8.4.24 Cisco Adaptive Security Appliance 9.8.4.25 Cisco Adaptive Security Appliance 9.8.4.26 Cisco Adaptive Security Appliance 9.8.4.29 Cisco Adaptive Security Appliance 9.8.4.32 Cisco Adaptive Security Appliance 9.8.4.33 Cisco Adaptive Security Appliance 9.8.4.34 Cisco Adaptive Security Appliance 9.8.4.35 Cisco Adaptive Security Appliance 9.8.4.39 Cisco Adaptive Security Appliance 9.8.4.40 Cisco Adaptive Security Appliance 9.8.4.41 Cisco Adaptive Security Appliance 9.8.4.43 Cisco Adaptive Security Appliance 9.8.4.44 Cisco Adaptive Security Appliance 9.8.4.45 Cisco Adaptive Security Appliance 9.9 Cisco Adaptive Security Appliance 9.9.0 Cisco Adaptive Security Appliance 9.9.1 Cisco Adaptive Security Appliance 9.9.1.2 Cisco Adaptive Security Appliance 9.9.1.3 Cisco Adaptive Security Appliance 9.9.1.4 Cisco Adaptive Security Appliance 9.9.1.5 Cisco Adaptive Security Appliance 9.9.2 Cisco Adaptive Security Appliance 9.9.2.1 Cisco Adaptive Security Appliance 9.9.2.9 Cisco Adaptive Security Appliance 9.9.2.14 Cisco Adaptive Security Appliance 9.9.2.18 Cisco Adaptive Security Appliance 9.9.2.25 Cisco Adaptive Security Appliance 9.9.2.27 Cisco Adaptive Security Appliance 9.9.2.32 Cisco Adaptive Security Appliance 9.9.2.36 Cisco Adaptive Security Appliance 9.9.2.40 Cisco Adaptive Security Appliance 9.9.2.47 Cisco Adaptive Security Appliance 9.9.2.50 Cisco Adaptive Security Appliance 9.9.2.52 Cisco Adaptive Security Appliance 9.9.2.56 Cisco Adaptive Security Appliance 9.9.2.59 Cisco Adaptive Security Appliance 9.9.2.61 Cisco Adaptive Security Appliance 9.9.2.66 Cisco Adaptive Security Appliance 9.9.2.67 Cisco Adaptive Security Appliance 9.9.2.74 Cisco Adaptive Security Appliance 9.9.2.80 Cisco Adaptive Security Appliance 9.9.2.83 Cisco Adaptive Security Appliance 9.9.2.85 Cisco Adaptive Security Appliance 9.9.2.235 Cisco Adaptive Security Appliance 9.10 Cisco Adaptive Security Appliance 9.10.0 Cisco Adaptive Security Appliance 9.10.1 Cisco Adaptive Security Appliance 9.10.1.2 Cisco Adaptive Security Appliance 9.10.1.7 Cisco Adaptive Security Appliance 9.10.1.10 Cisco Adaptive Security Appliance 9.10.1.11 Cisco Adaptive Security Appliance 9.10.1.17 Cisco Adaptive Security Appliance 9.10.1.22 Cisco Adaptive Security Appliance 9.10.1.27 Cisco Adaptive Security Appliance 9.10.1.30 Cisco Adaptive Security Appliance 9.10.1.32 Cisco Adaptive Security Appliance 9.10.1.37 Cisco Adaptive Security Appliance 9.10.1.40 Cisco Adaptive Security Appliance 9.10.1.42 Cisco Adaptive Security Appliance 9.10.1.43 Cisco Adaptive Security Appliance 9.10.1.44 Cisco Adaptive Security Appliance 9.11 Cisco Adaptive Security Appliance 9.12 Cisco Adaptive Security Appliance 9.12.0 Cisco Firepower Threat Defense - Cisco Firepower Threat Defense 5.3.0 Cisco Firepower Threat Defense 5.4.0 Cisco Firepower Threat Defense 6.0 Cisco Firepower Threat Defense 6.0.0 Cisco Firepower Threat Defense 6.0.0.1 Cisco Firepower Threat Defense 6.0.1 Cisco Firepower Threat Defense 6.0.1.1 Cisco Firepower Threat Defense 6.0.1.2 Cisco Firepower Threat Defense 6.0.1.3 Cisco Firepower Threat Defense 6.0.1.4 Cisco Firepower Threat Defense 6.1.0 Cisco Firepower Threat Defense 6.1.0.1 Cisco Firepower Threat Defense 6.1.0.2 Cisco Firepower Threat Defense 6.1.0.3 Cisco Firepower Threat Defense 6.1.0.4 Cisco Firepower Threat Defense 6.1.0.5 Cisco Firepower Threat Defense 6.1.0.6 Cisco Firepower Threat Defense 6.1.0.7 Cisco Firepower Threat Defense 6.2.0 Cisco Firepower Threat Defense 6.2.0.1 Cisco Firepower Threat Defense 6.2.0.2 Cisco Firepower Threat Defense 6.2.0.3 Cisco Firepower Threat Defense 6.2.0.4 Cisco Firepower Threat Defense 6.2.0.5 Cisco Firepower Threat Defense 6.2.0.6 Cisco Firepower Threat Defense 6.2.1 Cisco Firepower Threat Defense 6.2.2 Cisco Firepower Threat Defense 6.2.2.1 Cisco Firepower Threat Defense 6.2.2.2 Cisco Firepower Threat Defense 6.2.2.3 Cisco Firepower Threat Defense 6.2.2.4 Cisco Firepower Threat Defense 6.2.2.5 Cisco Firepower Threat Defense 6.2.3 Cisco Firepower Threat Defense 6.2.3.0 Cisco Firepower Threat Defense 6.2.3.1 Cisco Firepower Threat Defense 6.2.3.2 Cisco Firepower Threat Defense 6.2.3.3 Cisco Firepower Threat Defense 6.2.3.4 Cisco Firepower Threat Defense 6.2.3.5 Cisco Firepower Threat Defense 6.2.3.6 Cisco Firepower Threat Defense 6.2.3.7 Cisco Firepower Threat Defense 6.2.3.8 Cisco Firepower Threat Defense 6.2.3.9 Cisco Firepower Threat Defense 6.2.3.10 Cisco Firepower Threat Defense 6.2.3.11 Cisco Firepower Threat Defense 6.2.3.12 Cisco Firepower Threat Defense 6.2.3.13 Cisco Firepower Threat Defense 6.2.3.14 Cisco Firepower Threat Defense 6.2.3.15 Cisco Firepower Threat Defense 6.2.3.16 Cisco Firepower Threat Defense 6.2.3.17 Cisco Firepower Threat Defense 6.2.3.18 Cisco Firepower Threat Defense 6.3.0 Cisco Firepower Threat Defense 6.3.0.1 Cisco Firepower Threat Defense 6.3.0.2 Cisco Firepower Threat Defense 6.3.0.3 Cisco Firepower Threat Defense 6.3.0.4 Cisco Firepower Threat Defense 6.3.0.5 Cisco Firepower Threat Defense 6.3.0.6 Cisco Firepower Threat Defense 6.4.0	233
Hardware	Cisco Cisco ASA 5506 X - Cisco ASA 5506H X - Cisco ASA 5506W X - Cisco ASA 5508 X - Cisco ASA 5516 X -	5

Common Weakness Enumeration (CWE)

CWE-331 - Insufficient Entropy

Common Attack Pattern Enumeration and Classification (CAPEC)

Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa5500x-entropy-6v9bHVYP