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CVE-2021-1504

HIGHCVSS 7.5/10EPSS 1.66%

Last modified

CVE-2021-1504 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. EPSS estimates a 1.66% chance of exploitation in the next 30 days.

Description

Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.66%

73.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense>= 6.5.0, < 6.6.4
CiscoFirepower Threat Defense>= 6.7.0, < 6.7.0.1
CiscoAdaptive Security Appliance Software>= 9.7, < 9.8.4.35
CiscoAdaptive Security Appliance Software>= 9.9, < 9.9.2.85
CiscoAdaptive Security Appliance Software>= 9.10, < 9.12.4.10
CiscoAdaptive Security Appliance Software>= 9.13, < 9.13.1.21
CiscoAdaptive Security Appliance Software>= 9.14, < 9.14.2.4
CiscoAdaptive Security Appliance Software>= 9.15, < 9.15.1.7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1504?
Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
How severe is CVE-2021-1504?
CVE-2021-1504 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1504?
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-2021-1504?

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

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Source: NVD / NIST