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CVE-2023-20095

Severity8.6 High CVSS 3.1 2 scores
WeaknessCWE-772
Published1 Nov 2023
Updated11 Aug 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 3 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 0.85% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached
Finding This CVE names only products the Waratek agent cannot be installed into (cisco/secure_firewall_threat_defense). They ship as sealed appliance images or as native code with no application JVM, so there is no start-up line to add -javaagent to. The vulnerability may well be a Java one; it is permanently out of ARMR's reach rather than outside its subject.

CVSS

8.6 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 8.6 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H psirt@cisco.com Secondary published
CVSS 3.1 8.6 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H NVD Primary

Affected software and releases

Products and versions

2 products, 177 version entries
SourceVendorProductSchemeAffected versions
nvd cisco adaptive security appliance software generic 9.8.1 · 9.8.1.5 · 9.8.1.7 · 9.8.2 · 9.8.2.8 · 9.8.2.14 · 9.8.2.15 · 9.8.2.17 · 9.8.2.20 · 9.8.2.24 · 9.8.2.26 · 9.8.2.28 · 9.8.2.33 · 9.8.2.35 · 9.8.2.38 · 9.8.3 · 9.8.3.8 · 9.8.3.11 · 9.8.3.14 · 9.8.3.16 · 9.8.3.18 · 9.8.3.21 · 9.8.3.26 · 9.8.3.29 · 9.8.4 · 9.8.4.3 · 9.8.4.7 · 9.8.4.8 · 9.8.4.10 · 9.8.4.12 · 9.8.4.15 · 9.8.4.17 · 9.8.4.20 · 9.8.4.22 · 9.8.4.25 · 9.8.4.26 · 9.8.4.29 · 9.8.4.32 · 9.8.4.33 · 9.8.4.34 · 9.8.4.35 · 9.8.4.39 · 9.8.4.40 · 9.8.4.41 · 9.8.4.43 · 9.8.4.44 · 9.8.4.45 · 9.12.1 · 9.12.1.2 · 9.12.1.3 · 9.12.2 · 9.12.2.1 · 9.12.2.4 · 9.12.2.5 · 9.12.2.9 · 9.12.3 · 9.12.3.2 · 9.12.3.7 · 9.12.3.9 · 9.12.4 · 9.12.4.4 · 9.12.4.7 · 9.12.4.8 · 9.12.4.10 · 9.12.4.13 · 9.12.4.18 · 9.12.4.24 · 9.12.4.26 · 9.12.4.29 · 9.12.4.30 · 9.12.4.35 · 9.12.4.37 · 9.12.4.38 · 9.12.4.39 · 9.12.4.40 · 9.12.4.41 · 9.14.1 · 9.14.1.6 · 9.14.1.10 · 9.14.1.15 · 9.14.1.19 · 9.14.1.30 · 9.14.2 · 9.14.2.4 · 9.14.2.8 · 9.14.2.13 · 9.14.2.15 · 9.14.3 · 9.14.3.1 · 9.14.3.9 · 9.14.3.11 · 9.14.3.13 · 9.14.3.15 · 9.14.3.18 · 9.14.4 · 9.14.4.6 · 9.14.4.7 · 9.15.1 · 9.15.1.7 · 9.15.1.10 · 9.15.1.15 · 9.15.1.16 · 9.15.1.17 · 9.15.1.21 · 9.16.1 · 9.16.1.28 · 9.16.2 · 9.16.2.3 · 9.16.2.7 · 9.16.2.11 · 9.16.2.13 · 9.16.2.14 · 9.16.3 · 9.16.3.3 · 9.16.3.14 · 9.17.1 · 9.17.1.7 · 9.17.1.9 · 9.18.1
nvd cisco secure firewall threat defense generic 6.2.3 · 6.2.3.0 · 6.2.3.1 · 6.2.3.2 · 6.2.3.3 · 6.2.3.4 · 6.2.3.5 · 6.2.3.6 · 6.2.3.7 · 6.2.3.8 · 6.2.3.9 · 6.2.3.10 · 6.2.3.11 · 6.2.3.12 · 6.2.3.13 · 6.2.3.14 · 6.2.3.15 · 6.2.3.16 · 6.2.3.17 · 6.2.3.18 · 6.4.0 · 6.4.0.1 · 6.4.0.2 · 6.4.0.3 · 6.4.0.4 · 6.4.0.5 · 6.4.0.6 · 6.4.0.7 · 6.4.0.8 · 6.4.0.9 · 6.4.0.10 · 6.4.0.11 · 6.4.0.12 · 6.4.0.13 · 6.4.0.14 · 6.4.0.15 · 6.6.0 · 6.6.0.1 · 6.6.1 · 6.6.3 · 6.6.4 · 6.6.5 · 6.6.5.1 · 6.6.5.2 · 6.7.0 · 6.7.0.1 · 6.7.0.2 · 6.7.0.3 · 7.0.0 · 7.0.0.1 · 7.0.1 · 7.0.1.1 · 7.0.2 · 7.0.2.1 · 7.0.3 · 7.1.0 · 7.1.0.1 · 7.1.0.2

References

URLTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-webvpn-dos-3GhZQBAS Vendor Advisory

Timeline

Published2023-11-01By the CVE Program.
NVD record modified2026-08-11NVD's own last-modified date for this record.