An issue was discovered in Ubuntu wpa_supplicant that resulted in loading of arbitrary shared objects, which allows a local unprivileged attacker to escalate privileges to the user that wpa_supplicant runs as (usually root). Membership in the netdev group or access to the dbus interface of wpa_supplicant allow an unprivileged user to specify an arbitrary path to a module to be loaded by the wpa_supplicant process; other escalation paths might exist.
This vulnerability is classified as high severity with a CVSS score of 8.8, indicating a significant risk to organizations using the affected software. The potential for exploitation is notable, as it allows attackers to gain elevated privileges and potentially compromise the system's integrity.
Organizations should prioritize patching immediately to mitigate this risk. Local unprivileged users with specific access rights are the primary threat vector, making it crucial for system administrators to review user permissions and limit access as needed.
The vulnerability was published on August 7, 2024, and requires immediate attention to prevent potential exploitation. Conducting regular security assessments can help identify and address vulnerabilities before they can be exploited.
Vulnerability Details
The vulnerability allows for arbitrary shared object loading, which stems from improper input validation when loading modules. This is categorized under CWE-427, indicating a vulnerability related to untrusted search path.
The attack vector is local, requiring an attacker to have local access to the system. The attack complexity is low, and the privilege required for exploitation is also low, meaning that an attacker does not need elevated permissions to carry out the attack.
The confidentiality, integrity, and availability impacts are all rated as high, underscoring the critical nature of this vulnerability and the urgency for organizations to remediate it.
Technical Analysis
The root cause of this vulnerability lies in the design of the wpa_supplicant daemon, which allows for the loading of shared objects from arbitrary paths. Attackers may leverage this by manipulating the environment to specify a malicious module for loading.
The attack vector is local, meaning that an attacker must have physical or local access to the machine. Given the low complexity of the attack, and the low privileges required, this makes it particularly dangerous in environments where multiple users have access to the system.
User interaction is not required, making this vulnerability easier to exploit. The high impact on confidentiality, integrity, and availability further stresses the need for immediate remediation.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive data, potential loss of data integrity, and disruption of service availability. The blast radius of this vulnerability is significant, as an attacker with local access could exploit the vulnerability to gain root access, allowing them to control the entire system.
The urgency assessment based on the CVSS score indicates that organizations must take immediate action to address this vulnerability. Regular patch management and monitoring of user access rights can help mitigate this risk.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of wpa_supplicant prior to the vendor patch are affected. Organizations should check their systems for the presence of vulnerable versions.
Mitigation & Remediation
Organizations should prioritize applying the latest patches to their wpa_supplicant installations. If immediate patching is not feasible, consider implementing network controls to restrict access to the wpa_supplicant process and review user permissions.
For further assistance, organizations can engage in penetration testing services to identify vulnerabilities.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual module loading activities and investigate any anomalies in user permissions related to the wpa_supplicant process.
AppSecure Threat Intelligence Insight
This vulnerability highlights a common risk associated with local privilege escalation vulnerabilities. Security teams should analyze patterns in privilege escalation attempts and implement robust access controls to mitigate risks. Regular security assessments can help identify similar vulnerabilities in other systems.
For further reading on vulnerability management and security best practices, organizations may find the following resources useful: vulnerability management program design, penetration testing methodology, and security testing best practices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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