CVE-2023-27351 is a high-severity vulnerability affecting PaperCut NG versions prior to 22.0.9, which allows remote attackers to bypass authentication without any authentication requirements. The vulnerability arises from an improper implementation of the authentication algorithm within the SecurityRequestFilter class. Attackers leveraging this vulnerability could gain unauthorized access to the system, leading to significant security risks.
With a CVSS score of 7.5, the vulnerability is classified as high severity due to its potential for high confidentiality impact and the low complexity required to exploit it. The attack vector is network-based, meaning that remote attackers can target affected installations directly over the network, heightening the urgency for organizations to address this issue.
The vulnerability was published on April 20, 2023, and affects various versions of PaperCut MF and NG. Organizations using these products should prioritize patching to mitigate the risk associated with this vulnerability, especially given its exploitability without authentication.
Risk to organizations includes unauthorized access to sensitive data and potential exploitation by malicious actors. Therefore, organizations should prioritize patching immediately.
Vulnerability Details
This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SecurityRequestFilter class. The issue results from improper implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-19226.
CVE-2023-27351 has a CVSS score of 7.5, denoting high severity. The affected products include PaperCut MF and PaperCut NG in the specified vulnerable versions. The vulnerability was disclosed on April 20, 2023.
Technical Analysis
The root cause of CVE-2023-27351 lies in the improper implementation of the authentication algorithm within the SecurityRequestFilter class. This flaw allows attackers to bypass authentication controls, gaining unauthorized access to the system.
The attack vector for this vulnerability is network-based, requiring no user interaction. It has low attack complexity, as attackers do not need any privileges to exploit it. Consequently, the confidentiality impact is rated as high, while the integrity and availability impacts are rated as none.
Risk & Impact Analysis
The existence of this vulnerability poses significant risks to organizations using affected versions of PaperCut. The potential for unauthorized access means that sensitive data may be exposed, leading to data breaches or compliance violations. Organizations should be particularly vigilant about monitoring their systems for signs of exploitation.
Given the high CVSS score and the fact that this vulnerability is not included in the KEV (Known Exploited Vulnerability) catalog, organizations must take immediate action to patch their systems. The high exploitability score indicates that this vulnerability is likely to be targeted by attackers.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of PaperCut include:
1. PaperCut MF: Versions 15.0.0 to 20.1.6 (inclusive), 21.0.0 to 21.2.10 (inclusive), and 22.0.0 to 22.0.8 (inclusive).
2. PaperCut NG: Versions 15.0.0 to 20.1.6 (inclusive), 21.0.0 to 21.2.10 (inclusive), and 22.0.0 to 22.0.8 (inclusive).
Mitigation & Remediation
Organizations should prioritize patching immediately to remediate CVE-2023-27351. Upgrading to the latest version of PaperCut MF or NG is critical to prevent unauthorized access.
If patching is not feasible, organizations should implement network controls to restrict access to the PaperCut application and monitor for any unauthorized access attempts.
For further guidance on security assessments, organizations can consult our penetration testing services.
Detection Guidance
Organizations should monitor the following indicators to detect potential exploitation of CVE-2023-27351:
1. Logs for unauthorized access attempts.
2. Behavioral anomalies in user access patterns.
3. Network signatures indicating attempts to exploit the vulnerability.
AppSecure Threat Intelligence Insight
CVE-2023-27351 highlights a critical area of concern in authentication mechanisms within network applications. The implications of such vulnerabilities extend beyond immediate exploitation, as they can lead to broader security breaches if not addressed. Organizations must adopt a proactive security posture, including regular security assessments and updates to authentication protocols.
For organizations seeking to enhance their security measures, our vulnerability management program can provide valuable insights.
Additionally, understanding the importance of secure coding practices can help prevent similar vulnerabilities in the future. Organizations can benefit from our resources on secure coding practices to enhance their development processes.
Finally, organizations are encouraged to keep abreast of the latest trends in vulnerability management and exploitation tactics by regularly consulting our penetration testing methodology blog.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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