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Cisco Cisco Adaptive Security Appliance (ASA) Software

CVE-2023-20269
MEDIUM 5.0CISA KEV ↗Exploited per ENISA since 2023-09-13

At a glance

Source
NVD
EPSS
EPSS 26.62 % · percentile 98 ()
State
PUBLISHED
Published
Updated
Assigner
cisco
NVD status
Analyzed

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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 conduct a brute force attack in an attempt to identify valid username and password combinations or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user. This vulnerability is due to improper separation of authentication, authorization, and accounting (AAA) between the remote access VPN feature and the HTTPS management and site-to-site VPN features. An attacker could exploit this vulnerability by specifying a default connection profile/tunnel group while conducting a brute force attack or while establishing a clientless SSL VPN session using valid credentials. A successful exploit could allow the attacker to achieve one or both of the following: Identify valid credentials that could then be used to establish an unauthorized remote access VPN session. Establish a clientless SSL VPN session (only when running Cisco ASA Software Release 9.16 or earlier). Notes: Establishing a client-based remote access VPN tunnel is not possible as these default connection profiles/tunnel groups do not and cannot have an IP address pool configured. This vulnerability does not allow an attacker to bypass authentication. To successfully establish a remote access VPN session, valid credentials are required, including a valid second factor if multi-factor authentication (MFA) is configured. Cisco will release software updates that address this vulnerability. There are workarounds that address this vulnerability.

Weaknesses (CWE)

  • CWE-288 — Authentication Bypass Using an Alternate Path or Channel
  • CWE-863 — Incorrect Authorization

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:Ncisco
CVSS 3.1MEDIUM 5.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:NNVD · psirt@cisco.com (Secondary)
CVSS 3.1CRITICAL 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NNVD · nvd@nist.gov (Primary)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
Cisco · Cisco Adaptive Security Appliance (ASA) Softwareaffected 9.8.1 ; affected 9.8.1.5 ; affected 9.8.1.7 ; affected 9.8.2 ; affected 9.8.2.8 ; affected 9.8.2.14
Cisco · Cisco Firepower Threat Defense Softwareaffected 6.2.3 ; affected 6.2.3.1 ; affected 6.2.3.2 ; affected 6.2.3.3 ; affected 6.2.3.4 ; affected 6.2.3.5

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
CISA Known Exploited VulnerabilitiesCC0 1.0
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD