A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established. This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges.
With a CVSS score of 7.8, this vulnerability is classified as high severity, indicating that it poses a significant risk to organizations. The improper permissions assigned during the update process expose systems to potential exploitation, making it vital for defenders to address this vulnerability promptly.
Currently, there is evidence that this vulnerability is exploitable, emphasizing the urgency for organizations to prioritize patching. Failure to remediate may result in unauthorized access and control over affected systems.
Organizations should take immediate action to address this vulnerability to protect their systems and data. The risk to organizations includes potential unauthorized access to sensitive information and systems.
Vulnerability Details
A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established. This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges.
The CVSS score for this vulnerability is 7.8, indicating a high severity level. The vulnerability is classified under CWE-276, which pertains to improper privilege management.
It affects multiple products, including Cisco AnyConnect Secure Mobility Client and Cisco Secure Client Software for Windows. The vulnerability was published on June 28, 2023.
Technical Analysis
The root cause of this vulnerability stems from improper permissions on a temporary directory created during the client update process. The attack vector is local, requiring the attacker to have low privileges on the target system. The attack complexity is rated as low, meaning that an attacker could exploit this vulnerability with minimal effort.
Privileges required for exploitation are low, and user interaction is not necessary. The impact on confidentiality, integrity, and availability is high, as successful exploitation could allow an attacker to execute arbitrary code with SYSTEM privileges.
Risk & Impact Analysis
Organizations utilizing Cisco AnyConnect Secure Mobility Client Software or Cisco Secure Client Software are at risk of unauthorized privilege escalation. The potential blast radius is significant due to the high level of access granted to SYSTEM privileges. This vulnerability exemplifies a common security issue where improper permission settings can lead to serious security breaches.
Organizations should prioritize patching immediately. The exploitation status is concerning, as there is an active proof of concept available on GitHub, which may lead to increased attempts to exploit this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected by this vulnerability: Cisco AnyConnect Secure Mobility Client versions prior to 4.10.07061 and Cisco Secure Client versions prior to 5.0.02075. All versions prior to vendor patch are vulnerable.
Mitigation & Remediation
Organizations should apply the latest patches from Cisco to remediate this vulnerability. Upgrade to the latest versions of Cisco AnyConnect Secure Mobility Client (4.10.07061 or later) and Cisco Secure Client (5.0.02075 or later). If a patch is not available, consider implementing workarounds such as restricting access to the affected temporary directories and monitoring for unusual activity.
For comprehensive security practices, organizations may also consider engaging in penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for indicators of exploitation, such as unauthorized access attempts or unusual changes in system behavior. Behavioral anomalies that deviate from typical operations can be a sign of exploitation attempts. Additionally, network signatures that detect abnormal traffic patterns related to the update process could provide early warnings of potential attacks.
AppSecure Threat Intelligence Insight
The significance of CVE-2023-20178 lies in its demonstration of how local privilege escalation vulnerabilities can lead to severe security threats. This incident highlights the importance of stringent permission management during software updates. As organizations evolve their security postures, embracing a proactive approach to vulnerability management is essential.
Security teams should evaluate their current practices against similar vulnerabilities and consider integrating more comprehensive security measures, such as regular security assessments and vulnerability management programs to stay ahead of potential threats.
Furthermore, organizations can benefit from adopting a penetration testing methodology to ensure that their defenses are robust and resilient against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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