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CVE-2022-20715

HIGHCVSS 8.6/10EPSS 1.23%

Last modified

CVE-2022-20715 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation of errors that are logged as a result of client connections that are made using remote access VPN. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation of errors that are logged as a result of client connections that are made using remote access VPN. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to cause the affected device to restart, resulting in a DoS condition.

Metrics

CVSS 3.1
8.6/10

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

EPSS Probability
1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense< 6.4.0.15
CiscoFirepower Threat Defense>= 6.5.0, < 6.6.5.2
CiscoFirepower Threat Defense>= 6.7.0, < 7.0.2
CiscoFirepower Threat Defense7.1.0
CiscoAdaptive Security Appliance Software< 9.8.4.44
CiscoAdaptive Security Appliance Software>= 9.9, < 9.12.4.38
CiscoAdaptive Security Appliance Software>= 9.13, < 9.14.4
CiscoAdaptive Security Appliance Software>= 9.15, < 9.15.1.21
CiscoAdaptive Security Appliance Software>= 9.16.0, < 9.16.2.14
CiscoAdaptive Security Appliance Software>= 9.17.0, < 9.17.1.7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-20715?
A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation of errors that are logged as a result of client connections that are made using remote access VPN. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to cause the affected device to restart, resulting in a DoS condition.
How severe is CVE-2022-20715?
CVE-2022-20715 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.
How do I fix CVE-2022-20715?
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-2022-20715?

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

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Source: NVD / NIST