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CVE-2023-20256

MEDIUM
Published 2023-11-01T16:54:53.004Z
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CVSS Score

V3.1
5.0
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.067
Higher than 6.7% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
NONE
Integrity
LOW
Availability
NONE

Description

Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured access control list (ACL) and allow traffic that should be denied to flow through an affected device. These vulnerabilities are due to a logic error that could occur when the affected software constructs and applies per-user-override rules. An attacker could exploit these vulnerabilities by connecting to a network through an affected device that has a vulnerable configuration. A successful exploit could allow the attacker to bypass the interface ACL and access resources that would should be protected.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Cisco

Cisco Adaptive Security Appliance (ASA) Software

Affected Versions:

9.8.4.25 9.8.4.22 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 9.8.4.46 9.8.4.48 9.12.4.2 9.12.4.4 9.12.4.7 9.12.4.10 9.12.4.13 9.12.4.8 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 9.12.4.47 9.12.4.48 9.12.4.50 9.12.4.52 9.12.4.54 9.12.4.55 9.12.4.56 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 9.14.3.18 9.14.3.15 9.14.4 9.14.4.6 9.14.4.7 9.14.4.12 9.14.4.13 9.14.4.14 9.14.4.15 9.14.4.17 9.14.4.22 9.14.4.23 9.15.1 9.15.1.7 9.15.1.10 9.15.1.15 9.15.1.16 9.15.1.17 9.15.1.1 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 9.16.3.15 9.16.3.19 9.16.3.23 9.16.4 9.16.4.9 9.16.4.14 9.17.1 9.17.1.7 9.17.1.9 9.17.1.10 9.17.1.11 9.17.1.13 9.17.1.15 9.17.1.20 9.17.1.30 9.18.1 9.18.1.3 9.18.2 9.18.2.5 9.18.2.7 9.18.2.8 9.18.3 9.19.1 9.19.1.5
Cisco

Cisco Firepower Threat Defense Software

Affected Versions:

6.2.3.16 6.2.3.17 6.2.3.18 6.6.1 6.6.3 6.6.4 6.6.5 6.6.5.1 6.6.5.2 6.6.7 6.6.7.1 6.4.0.10 6.4.0.11 6.4.0.12 6.4.0.13 6.4.0.14 6.4.0.15 6.4.0.16 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 7.0.4 7.0.5 7.1.0 7.1.0.1 7.1.0.2 7.1.0.3 7.2.0 7.2.0.1 7.2.1 7.2.2 7.2.3 7.3.0 7.3.1 7.3.1.1

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-qfvx-xc98-9qgh

Advisory Details

Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured access control list (ACL) and allow traffic that should be denied to flow through an affected device. These vulnerabilities are due to a logic error that could occur when the affected software constructs and applies per-user-override rules. An attacker could exploit these vulnerabilities by connecting to a network through an affected device that has a vulnerable configuration. A successful exploit could allow the attacker to bypass the interface ACL and access resources that would should be protected.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-20256
WEB https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ac-acl-bypass-bwd7q6Gb

Advisory provided by GitHub Security Advisory Database. Published: November 1, 2023, Modified: November 1, 2023

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ac-acl-bypass-bwd7q6Gb
Published: 2023-11-01T16:54:53.004Z
Last Modified: 2024-11-21T21:44:44.427Z
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