CVE-2024-20293 Vulnerability Analysis & Exploit Details

CVE-2024-20293
Vulnerability Scoring

5.8
/10
Significant Risk

Security assessments indicate that CVE-2024-20293 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2024-20293 Details

Status: Analyzed

Last updated: 🕖 30 Jul 2025, 19:06 UTC
Originally published on: 🕔 22 May 2024, 17:16 UTC

Time between publication and last update: 434 days

CVSS Release: version 3

CVSS3 Source

psirt@cisco.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2024-20293 Vulnerability Summary

CVE-2024-20293: A vulnerability in the activation of an access control list (ACL) on Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to a logic error that occurs when an ACL changes from inactive to active in the running configuration of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. The reverse condition is also true—traffic that should be permitted could be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting. Note: This vulnerability applies to both IPv4 and IPv6 traffic as well as dual-stack ACL configurations in which both IPv4 and IPv6 ACLs are configured on an interface.

Assessing the Risk of CVE-2024-20293

Access Complexity Graph

The exploitability of CVE-2024-20293 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2024-20293

With low attack complexity and no required privileges, CVE-2024-20293 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2024-20293, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2024-20293, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2024-20293 has no significant impact on data confidentiality.
  • Integrity: Low
    Exploiting CVE-2024-20293 may cause minor changes to data without severely impacting its accuracy.
  • Availability: None
    CVE-2024-20293 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.043% (probability of exploit)

EPSS Percentile: 12.0% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 88.0% of others.

CVE-2024-20293 References

External References

CWE Common Weakness Enumeration

CWE-436

CAPEC Common Attack Pattern Enumeration and Classification

  • HTTP Request Splitting CAPEC-105 An adversary abuses the flexibility and discrepancies in the parsing and interpretation of HTTP Request messages by different intermediary HTTP agents (e.g., load balancer, reverse proxy, web caching proxies, application firewalls, etc.) to split a single HTTP request into multiple unauthorized and malicious HTTP requests to a back-end HTTP agent (e.g., web server). See CanPrecede relationships for possible consequences.
  • HTTP Response Smuggling CAPEC-273 An adversary manipulates and injects malicious content in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., server). See CanPrecede relationships for possible consequences. Modification/manipulation of HTTP message headers, request-line and body parameters to disrupt and interfere in the interpretation and parsing of HTTP message lengths/boundaries for consecutive HTTP messages by HTTP agents in a HTTP chain or network path.
  • HTTP Response Splitting CAPEC-34 An adversary manipulates and injects malicious content, in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., web server) or into an already spoofed HTTP response from an adversary controlled domain/site. See CanPrecede relationships for possible consequences.

Vulnerable Configurations

  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.5:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.5:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.9:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.9:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.12:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.12:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.18:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.18:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.22:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.22:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.24:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.24:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:*:*:*:*:*:*:*
  • cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:7.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:7.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:7.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:7.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:7.3.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:7.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:7.4.0:*:*:*:*:*:*:*

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