CVE-2023-34969 is a medium-severity vulnerability affecting D-Bus versions prior to 1.15.6. This vulnerability allows unprivileged users to crash dbus-daemon, leading to potential denial-of-service situations. If a privileged user monitoring the message bus traffic is using the org.freedesktop.DBus.Monitoring interface, an unprivileged user can exploit this vulnerability by sending an unreplyable message, causing a crash of the dbus-daemon. The fixed versions include 1.12.28, 1.14.8, and 1.15.6.
The vulnerability, classified with a CVSS score of 6.5, presents a significant risk to organizations using affected versions of D-Bus, especially in environments where the system bus is utilized. The ability to crash the dbus-daemon can disrupt services that rely on this component, thus necessitating immediate attention from security teams.
Organizations should prioritize patching immediately to the fixed versions to mitigate the risks associated with this vulnerability. The exploitation status indicates that there are no confirmed public exploits at this time, but the potential for denial of service warrants prompt action.
Given the nature of this vulnerability, it is crucial for organizations to assess their use of D-Bus and ensure they are operating on versions that have addressed this issue.
Vulnerability Details
D-Bus before 1.15.6 sometimes allows unprivileged users to crash dbus-daemon. The vulnerability can be exploited when a privileged user is monitoring the message bus traffic using the org.freedesktop.DBus.Monitoring interface. The unprivileged user can send an unreplyable message to the dbus-daemon, causing it to crash. This results in a denial-of-service vulnerability when conducted on the system bus.
The CVSS score for this vulnerability is 6.5, classifying it as medium severity. The score reflects the attack vector being network-based, with low complexity and requiring low privileges to execute the attack. The availability impact is rated high, meaning that the service can be disrupted effectively.
The affected products include D-Bus versions 1.12.28, 1.14.8, and 1.15.6. The publication date for this vulnerability is June 8, 2023, and it is classified under CWE-404.
Technical Analysis
The root cause of this vulnerability lies in the handling of message traffic by the dbus-daemon. The unprivileged user’s ability to send a message that the dbus-daemon cannot reply to causes the service to crash. This scenario is particularly concerning in environments where the dbus-daemon is relied upon for inter-process communication.
The attack vector is network-based, indicating that an attacker could exploit this vulnerability remotely without needing physical access to the system. The attack complexity is low, as it requires low privileges to initiate the attack, making it easier for potential attackers to exploit.
User interaction is not required, as the exploit can be executed solely through the network. The impact on confidentiality and integrity is rated as none, while the availability impact is rated high, highlighting the severity of the potential service disruption.
Risk & Impact Analysis
The real-world risk associated with CVE-2023-34969 involves the potential for denial-of-service attacks against systems utilizing D-Bus. Given that this vulnerability allows unprivileged users to crash the dbus-daemon, it can lead to significant disruptions in services reliant on this component, affecting operational continuity.
Organizations that utilize D-Bus in their infrastructure must assess the potential blast radius of this vulnerability, particularly in environments with high inter-process communication demands. The urgency of addressing this vulnerability is underscored by its CVSS score of 6.5, which indicates a medium-level threat to availability.
Security teams should prioritize patching the affected versions of D-Bus as part of their routine maintenance and incident response processes. The potential for exploitation, although currently low due to the lack of public exploits, should not be underestimated.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions affected by this vulnerability include D-Bus versions prior to 1.15.6. Specifically, the vulnerable versions are:
1.12.0 up to, but not including 1.12.28 1.14.0 up to, but not including 1.14.8 1.15.0 up to, but not including 1.15.6
Mitigation & Remediation
Organizations should prioritize patching immediately. The recommended fixed versions are 1.12.28, 1.14.8, and 1.15.6. If immediate patching is not possible, consider implementing the following workarounds:
1. Restrict access to the dbus-daemon to trusted users only. 2. Monitor system logs for unusual activity related to dbus-daemon. 3. Consider applying network controls to limit exposure to untrusted networks.
For more comprehensive security measures, organizations can engage in penetration testing to identify similar vulnerabilities.
Detection Guidance
Security teams should monitor the following indicators to detect potential exploitation of this vulnerability:
1. Log entries indicating dbus-daemon crashes or restarts. 2. Unusual message traffic patterns associated with the dbus-daemon. 3. Abnormal user activity patterns on systems utilizing D-Bus.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-34969 lies in its ability to disrupt critical services relying on D-Bus for inter-process communication. As organizations increasingly adopt microservices architectures, the reliance on such message buses becomes paramount. This vulnerability represents a trend where low-privilege user actions can lead to significant service disruptions.
Security teams should consider this vulnerability a reminder of the importance of monitoring and controlling access to core system components. Implementing robust security practices and engaging in regular assessments can help prevent similar vulnerabilities from being exploited in the future.
For further reading on security testing best practices, organizations can explore our penetration testing methodology to strengthen their defenses.
Engaging in continuous security assessments is essential for adapting to evolving threats. For organizations looking to improve their security posture, leveraging services such as continuous penetration testing can provide insights into potential vulnerabilities and help mitigate risks effectively.
Known Exploitation Timeline
This vulnerability has not been included in the Known Exploited Vulnerabilities (KEV) catalog, indicating that there are currently no known active exploitation cases.
EPSS Risk Context
The EPSS score for CVE-2023-34969 is 0.0067, placing it in the 71st percentile. This indicates a low probability of exploitation in the next 30 days, suggesting that while it is a vulnerability of concern, immediate exploitation is not highly likely.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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