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CVE-2023-20095

Cisco Adaptive Security Appliance Software vulnerability

8.6 HIGHEPSS 0.65%
  1. Published1 Nov 2023

Description

A vulnerability in the remote access VPN feature 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 handling of HTTPS requests. An attacker could exploit this vulnerability by sending crafted HTTPS requests to an affected system. A successful exploit could allow the attacker to cause resource exhaustion, resulting in a DoS condition.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

Cisco Secure Firewall Threat Defense6.2.3 · 6.2.3.0 · 6.2.3.1 · 6.2.3.10
Cisco Adaptive Security Appliance Software9.12.1 · 9.12.1.2 · 9.12.1.3 · 9.12.2

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2023-20095 being actively exploited?

CVE-2023-20095 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.65%.

How severe is CVE-2023-20095?

CVE-2023-20095 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 0.65% probability of exploitation.

Which products are affected by CVE-2023-20095?

Affected products include Cisco Secure Firewall Threat Defense, Cisco Adaptive Security Appliance Software.

How do I fix CVE-2023-20095?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-20095 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.