A vulnerability was found in subscription-manager that allows local privilege escalation due to inadequate authorization. The D-Bus interface com.redhat.RHSM1 exposes a significant number of methods to all users that could change the state of the registration. By using the com.redhat.RHSM1.Config.SetAll() method, a low-privileged local user could tamper with the state of the registration, by unregistering the system or by changing the current entitlements. This flaw allows an attacker to set arbitrary configuration directives for /etc/rhsm/rhsm.conf, which can be abused to cause a local privilege escalation to an unconfined root.
The vulnerability has a CVSS score of 7.8, classified as high severity. This indicates a significant risk to organizations that utilize affected versions of the subscription-manager due to the potential for unauthorized access and control over system configurations.
Risk to organizations includes unauthorized changes to system settings, which can lead to broader security vulnerabilities and system instability. Organizations should prioritize patching immediately to mitigate this risk.
As of now, there are no public exploits confirmed for this vulnerability, making it essential for organizations to remain vigilant and apply any available patches or updates as soon as they are released.
Vulnerability Details
The vulnerability allows local privilege escalation via the com.redhat.RHSM1 D-Bus interface. This flaw results from insufficient authorization checks for various methods exposed to all users, enabling potential unauthorized modifications. The CVSS score of 7.8 indicates a high severity due to the low complexity of the attack and the high impact on confidentiality, integrity, and availability.
Technical Analysis
The root cause of this vulnerability is inadequate authorization within the D-Bus interface, which fails to restrict access to sensitive methods. The attack vector is local, implying that an attacker must have some level of local access to exploit this vulnerability. The attack complexity is low, requiring minimal effort to execute the privilege escalation. Privileges required are low, as the exploit can be initiated by a low-privileged user without needing any user interaction.
The impacts of exploitation include high confidentiality, integrity, and availability impacts, as the attacker could alter critical system configurations and potentially gain complete control over the affected systems.
Risk & Impact Analysis
Real-world deployment risk is notable, as an attacker could exploit this vulnerability to gain unauthorized access to sensitive system settings and potentially escalate their privileges. This could lead to a significant impact on organizational security, including data breaches and service disruptions. Given the CVSS score of 7.8 and the fact that this vulnerability is not currently in the KEV catalog, organizations must remain proactive in their patch management and vulnerability remediation efforts.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch for subscription-manager are affected, specifically those versions between 1.29.0 and 1.29.37, and all versions prior to 1.28.39. Additionally, systems running Fedora 37 and 38, as well as various editions of Red Hat Enterprise Linux, are also vulnerable.
Mitigation & Remediation
Organizations should verify their versions of subscription-manager and upgrade to the latest patched version to eliminate this vulnerability. In the absence of immediate patching, temporary workarounds may include restricting access to the D-Bus interface or monitoring for unauthorized changes to the configuration files. For comprehensive security, organizations can consider engaging in penetration testing to identify further vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for any unauthorized access attempts or changes to the registration status of systems. Behavioral anomalies in user activity, particularly from low-privileged accounts, should be flagged for review.
AppSecure Threat Intelligence Insight
The significance of CVE-2023-3899 lies in its representation of a broader trend of insufficient authorization in system components, particularly in widely used enterprise software. As organizations increasingly rely on local systems for sensitive operations, the importance of rigorous access controls cannot be overstated. Security teams should prioritize reviewing their access control policies and consider conducting regular audits as part of a comprehensive security strategy.
For further insights on securing enterprise environments, organizations can refer to best practices outlined in our penetration testing methodology guide and explore effective strategies for vulnerability management.
Additionally, organizations should stay informed about emerging threats and trends in cybersecurity by following our vulnerability management program updates for proactive defense.
Finally, organizations should consider implementing a security testing framework to identify and address vulnerabilities in their software development lifecycle.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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