CVE-2019-16759 is a critical vulnerability in vBulletin, specifically affecting versions 5.x through 5.5.4. This vulnerability allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request. With a CVSS score of 9.8, it highlights a severe risk that organizations must address.
Organizations using vBulletin are at a significant risk due to this vulnerability, which can be exploited without any authentication. This means that attackers can execute arbitrary commands on the server, leading to potential data breaches, unauthorized access, or service disruptions.
The risk to organizations includes unauthorized access to sensitive data, integrity compromises, and potential service outages, making it essential to prioritize remediation. Given the urgency associated with this vulnerability, organizations should prioritize patching immediately.
As of now, this vulnerability has known exploits in the wild, indicating that attackers are actively targeting vulnerable installations. Therefore, immediate action is required to mitigate the risks associated with CVE-2019-16759.
Vulnerability Details
The official description states that this vulnerability allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request. It has been classified under CWE-94 (Improper Control of Generation of Code).
The CVSS score of 9.8 categorizes this vulnerability as critical, emphasizing the potential for high confidentiality, integrity, and availability impacts due to its remote exploitability.
The vulnerability was published on September 24, 2019, and has been actively exploited since then. Organizations must ensure they are running the latest patched version of vBulletin to eliminate this vulnerability.
Technical Analysis
The root cause of this vulnerability lies in the improper validation of user-supplied input in the widgetConfig[code] parameter. Attackers can exploit this weakness to inject and execute arbitrary PHP code remotely.
The attack vector is network-based, and the complexity is low, making it accessible to a wide range of attackers. No privileges are required, nor is user interaction needed for exploitation.
Once exploited, the impact can be severe, affecting confidentiality, integrity, and availability. The attacker could gain full control over the affected server, leading to data theft or further compromise of connected systems.
Risk & Impact Analysis
The real-world deployment risk is substantial due to the ease of exploitation and the critical nature of the vulnerability. Any organization using vulnerable versions of vBulletin could face severe consequences, including unauthorized access to sensitive data and significant reputational damage.
The blast radius potential is extensive, as the vulnerability can be exploited remotely without authentication. Given the critical nature of this vulnerability, organizations should address it in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected versions of vBulletin are all versions from 5.0.0 to 5.5.4. Organizations running these versions must take immediate action to patch and secure their systems.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the vendor's patches and updates as soon as possible. For those unable to patch immediately, it is recommended to implement network controls to limit access to the vulnerable components.
For additional support, organizations may consider engaging in penetration testing services to identify any related weaknesses.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, such as unusual network traffic patterns or unauthorized command executions. Behavioral anomalies in application performance may also indicate potential exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2019-16759 highlights the importance of regular updates and robust security practices in application management. As the pattern of exploitation evolves, security teams must remain vigilant.
To further enhance defenses, organizations can implement strategies outlined in our vulnerability management program to identify and remediate similar vulnerabilities.
By adopting proactive measures and conducting regular security assessments, organizations can mitigate risks associated with vulnerabilities like CVE-2019-16759.
For continued education on maintaining security standards, our blog offers insights on best practices for penetration testing methodologies and security risk management.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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