Auth bypass in Cisco Adaptive Security Appliance Software
CVE-2022-20928
A vulnerability in the authentication and authorization flows for VPN connections in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to establish a connection as a different user. This vulnerability is due to a flaw in the authorization verifications during the VPN authentication flow. An attacker could exploit this vulnerability by sending a crafted packet during a VPN authentication. The attacker must have valid credentials to establish a VPN connection. A successful exploit could allow the attacker to establish a VPN connection with access privileges from a different user.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Cisco Adaptive Security Appliance Software — versions 9.6.1, 9.6.1.3, 9.6.1.5
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.8.1, 9.8.1.5, 9.8.1.7
- Cisco Firepower Services Software For Asa
- Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Firepower Threat Defense — versions 6.1.0, 6.1.0.1, 6.1.0.2
- Cisco Secure Firewall Threat Defense — versions 6.1.0, 6.1.0.1, 6.1.0.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2022-20928?
- CVE-2022-20928 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Incorrect Authorization. CVSS score: 5.8/10. Published 2022-11-15.
- How severe is CVE-2022-20928?
- Medium severity. CVSS v3 base score is 5.8 out of 10.