CVE-2024-38657 impacts Ivanti Connect Secure and Policy Secure

CVE-2024-38657 is a critical security vulnerability identified in Ivanti Connect Secure and Ivanti Policy Secure. This vulnerability has significant implications for the integrity and security of the affected systems.

Vulnerability Description

Nature of the Vulnerability

CVE-2024-38657 is an authenticated arbitrary file write vulnerability. The vulnerability arises because the affected software does not properly validate input, allowing an authenticated attacker with administrative privileges to write arbitrary files on the affected system.

The flaw exists due to external control of a file name in Ivanti Connect Secure before version 22.7R2.4 and Ivanti Policy Secure before version 22.7R1.3. This lack of proper validation allows the attacker to exploit the vulnerability by manipulating the file path.

Technical Details

Exploitation Method

Exploiting CVE-2024-38657 involves the following steps:

1. Authentication: The attacker must have administrative privileges on the affected system.
2. Crafting Malicious Input: The attacker crafts a specially constructed input to manipulate the file path and control the file name.
3. File Write: Using the crafted input, the attacker writes arbitrary files on the system, potentially overwriting critical system files or introducing malicious files.

Impact

Potential Risks

The successful exploitation of this vulnerability can lead to severe consequences, including:

• System Compromise: Attackers can overwrite critical system files, potentially leading to system instability or crashes.
• Unauthorized Access: By writing arbitrary files, attackers can introduce backdoors or malicious scripts, gaining unauthorized access to the system.
• Data Manipulation: Attackers can manipulate or delete important data, compromising the integrity and availability of the information.
• Privilege Escalation: The ability to write arbitrary files can be used to escalate privileges, giving attackers broader control over the affected system.

CVSS Score and Metrics

The Common Vulnerability Scoring System (CVSS) provides a standardized way to rate the severity of vulnerabilities. For CVE-2024-38657, the CVSS scores are as follows:

• Base Score: 9.1 (Critical)
• Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
• Attack Vector (AV): Network – The vulnerability can be exploited remotely over a network.
• Attack Complexity (AC): Low – The attack does not require complex conditions to be met.
• Privileges Required (PR): High – The attacker needs administrative privileges to exploit the vulnerability.
• User Interaction (UI): None – Exploitation does not require any user interaction.
• Scope (S): Changed – Exploitation affects multiple components within the system.
• Confidentiality (C): High – Exploitation results in significant loss of confidentiality.
• Integrity (I): High – Exploitation results in significant loss of integrity.
• Availability (A): High – Exploitation results in significant loss of availability.

Affected Versions

The vulnerability affects the following versions of Ivanti software:

• Ivanti Connect Secure: Versions prior to 22.7R2.4
• Ivanti Policy Secure: Versions prior to 22.7R1.3

Mitigation Measures

To protect against the exploitation of CVE-2024-38657, organizations should implement the following mitigation measures:

1. Apply Security Patches

• Update Software: Ensure that Ivanti Connect Secure is updated to version 22.7R2.6 and Ivanti Policy Secure is updated to version 22.7R1.3. Regularly check for updates and apply them promptly to minimize exposure to known vulnerabilities.
• Patch Management: Establish a robust patch management process to ensure that all software components are regularly updated to address known vulnerabilities.

2. Monitor System Activity

• Continuous Monitoring: Implement continuous monitoring of system activity to detect and respond to any signs of unauthorized access or suspicious behavior.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic and detect signs of exploitation attempts.

3. Enhance Security Configurations

• Access Controls: Review and enhance access controls to ensure that only authorized users have administrative privileges. Implement the principle of least privilege to limit the potential impact of compromised accounts.
• Input Validation: Implement strong input validation mechanisms to prevent unauthorized file manipulation. Ensure that all user inputs are properly sanitized before being processed by the system.

Final Thoughts

CVE-2024-38657 is a critical vulnerability that requires immediate attention and remediation. By applying the recommended updates, enhancing monitoring, and following best security practices, organizations can mitigate the risks associated with this vulnerability and protect their systems from potential exploitation.