CVE-2023-24044 is a medium severity host header injection vulnerability affecting Plesk Obsidian versions up to 18.0.49. This vulnerability allows attackers to redirect users to malicious websites by manipulating the Host request header. The vendor, Plesk, has indicated that allowing arbitrary domain names to access the panel is an intended feature, which raises questions about the implications of this vulnerability.
The CVSS score for this vulnerability is 6.1, categorized as medium severity. This score reflects a low attack complexity, no privileges required for exploitation, and a requirement for user interaction, indicating that users must be tricked into clicking a malicious link. Given its nature, the risk to organizations includes potential phishing attacks or other redirection to harmful sites.
Currently, there is known exploitation for this vulnerability, and it is crucial for organizations utilizing Plesk Obsidian to prioritize remediation. The urgency for defenders is significant due to the nature of the vulnerability and the potential for misuse in real-world scenarios.
Organizations should address this issue promptly as part of their vulnerability management efforts to mitigate the associated risks.
Vulnerability Details
The vulnerability is categorized under CWE-601, which is related to the improper validation of a hostname. The detailed CVE description states, "A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows attackers to redirect users to malicious websites via a Host request header." This vulnerability was published on January 22, 2023.
The primary attack vector is network-based, and the complexity is low, meaning that attackers can exploit this vulnerability without significant effort. User interaction is required, which means that for an attack to be successful, users must be manipulated into visiting a malicious link.
Technical Analysis
The root cause of this vulnerability lies in how the Plesk Obsidian application handles the Host header. By allowing any domain name to be specified in the Host header, attackers can redirect users to arbitrary websites. This could lead to phishing attacks where users are tricked into providing sensitive information or downloading malware.
The attack vector is via network interactions, and since it requires user interaction, it is critical for organizations to educate users about the risks associated with clicking unknown links. The impact on confidentiality and integrity is low, but the risk of redirecting users to malicious sites poses a significant threat.
Risk & Impact Analysis
Organizations using Plesk Obsidian must understand that this vulnerability carries real-world risks, particularly in deployment environments where users may be exposed to phishing attempts. The potential blast radius is concerning as attackers can easily redirect users, leading to unauthorized access or data breaches.
The urgency for patching this vulnerability is evaluated as medium, based on the CVSS score and the potential for exploitation. Organizations should prioritize addressing this vulnerability in their patch cycles to ensure user safety and data integrity.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of Plesk Obsidian up to and including 18.0.49. Organizations should ensure their systems are updated to the latest version to mitigate this vulnerability.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches from Plesk. The vendor has provided updates that address this issue. Additionally, organizations should validate their configurations and consider implementing strict input validation mechanisms to prevent malicious headers from being accepted.
For a comprehensive security posture, organizations can consider engaging in penetration testing to identify any further vulnerabilities.
Detection Guidance
Organizations should monitor their logs for unusual patterns that may indicate attempts to exploit this vulnerability. Specific indicators include unexpected redirects and abnormal user behavior. Additionally, network signatures can be implemented to detect potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-24044 highlights the necessity for organizations to maintain a proactive security posture. This vulnerability represents a trend where misconfigurations and oversights in web applications can lead to serious security flaws.
Security teams should learn from this incident to enhance their input validation mechanisms and user training regarding phishing attacks. Finally, organizations are encouraged to adopt regular security assessments, such as penetration testing methodology, to identify vulnerabilities before they can be exploited.
Additionally, organizations should review their incident response plans and ensure they are equipped to handle potential exploitation attempts efficiently.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)