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CVE-2022-20928

MEDIUMCVSS 5.8/10EPSS 0.68%

Last modified

CVE-2022-20928 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
5.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS Probability
0.68%

47.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoAdaptive Security Appliance Software9.6.1
CiscoAdaptive Security Appliance Software9.6.1.3
CiscoAdaptive Security Appliance Software9.6.1.5
CiscoAdaptive Security Appliance Software9.6.1.10
CiscoAdaptive Security Appliance Software9.6.2
CiscoAdaptive Security Appliance Software9.6.2.1
CiscoAdaptive Security Appliance Software9.6.2.2
CiscoAdaptive Security Appliance Software9.6.2.3
CiscoAdaptive Security Appliance Software9.6.2.7
CiscoAdaptive Security Appliance Software9.6.2.11
CiscoAdaptive Security Appliance Software9.6.2.13
CiscoAdaptive Security Appliance Software9.6.2.22
CiscoAdaptive Security Appliance Software9.6.2.23
CiscoAdaptive Security Appliance Software9.6.3
CiscoAdaptive Security Appliance Software9.6.3.1
CiscoAdaptive Security Appliance Software9.6.3.3
CiscoAdaptive Security Appliance Software9.6.3.8
CiscoAdaptive Security Appliance Software9.6.3.9
CiscoAdaptive Security Appliance Software9.6.3.11
CiscoAdaptive Security Appliance Software9.6.3.12
CiscoAdaptive Security Appliance Software9.6.3.14
CiscoAdaptive Security Appliance Software9.6.3.17
CiscoAdaptive Security Appliance Software9.6.3.20
CiscoAdaptive Security Appliance Software9.6.4
CiscoAdaptive Security Appliance Software9.6.4.3
CiscoAdaptive Security Appliance Software9.6.4.5
CiscoAdaptive Security Appliance Software9.6.4.6
CiscoAdaptive Security Appliance Software9.6.4.8
CiscoAdaptive Security Appliance Software9.6.4.10
CiscoAdaptive Security Appliance Software9.6.4.12
CiscoAdaptive Security Appliance Software9.6.4.14
CiscoAdaptive Security Appliance Software9.6.4.17
CiscoAdaptive Security Appliance Software9.6.4.18
CiscoAdaptive Security Appliance Software9.6.4.20
CiscoAdaptive Security Appliance Software9.6.4.22
CiscoAdaptive Security Appliance Software9.6.4.23
CiscoAdaptive Security Appliance Software9.6.4.24
CiscoAdaptive Security Appliance Software9.6.4.25
CiscoAdaptive Security Appliance Software9.6.4.29
CiscoAdaptive Security Appliance Software9.6.4.30
CiscoAdaptive Security Appliance Software9.6.4.34
CiscoAdaptive Security Appliance Software9.6.4.36
CiscoAdaptive Security Appliance Software9.6.4.40
CiscoAdaptive Security Appliance Software9.6.4.41
CiscoAdaptive Security Appliance Software9.6.4.42
CiscoAdaptive Security Appliance Software9.6.4.45
CiscoAdaptive Security Appliance Software9.7.1
CiscoAdaptive Security Appliance Software9.7.1.2
CiscoAdaptive Security Appliance Software9.7.1.4
CiscoAdaptive Security Appliance Software9.7.1.8

Showing 50 of 305 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2022-20928?
CVE-2022-20928 has a CVSS score of 5.8/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2022-20928?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-20928?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST