CVE-2021-23758 represents a high-severity vulnerability within the ajaxpro.2 package, which impacts all versions. This vulnerability allows deserialization of untrusted data, a critical issue that can be exploited to execute arbitrary .NET classes remotely. The potential for remote code execution poses a significant risk, as attackers may leverage this vulnerability to gain unauthorized access to systems.
The CVSS score for this vulnerability is 8.1, categorized as high severity, indicating a serious threat to organizations using the affected software. With a reported attack vector of 'network' and an attack complexity classified as 'high', the urgency for organizations to address this vulnerability is compounded by its potential consequences.
Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability. As the vulnerability has been modified and its status updated, it is essential for security teams to stay informed and act promptly.
In terms of exploitation status, the vulnerability is known to have a public proof of concept available on GitHub, increasing the risk of exploitation. Therefore, immediate attention is warranted.
Vulnerability Details
The official description of CVE-2021-23758 states that all versions of the ajaxpro.2 package are vulnerable to deserialization of untrusted data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.
The vulnerability has a CVSS score of 9.8 based on the primary analysis from NVD, which interprets it as critical. The attack vector is network-based, necessitating no privileges or user interaction, thus making it highly exploitable. The confidentiality, integrity, and availability impacts are all rated as high.
The affected product is identified as ajaxpro.2, with the last modification date on November 21, 2024. The vulnerability is classified under CWE-502, which refers to deserialization of untrusted data.
Technical Analysis
The root cause of this vulnerability is the insecure deserialization process, which allows attackers to manipulate the deserialization process to execute arbitrary code. The attack vector is primarily network-based, and the complexity is rated as high, meaning that while it may require sophisticated techniques, successful exploitation can lead to severe outcomes.
No user interaction is required to exploit this vulnerability, and it does not necessitate any privileges. The potential impacts on confidentiality, integrity, and availability are significant, as attackers may gain unauthorized access to sensitive data and systems.
Risk & Impact Analysis
Risk to organizations includes the potential for remote code execution, which can lead to unauthorized access, data breaches, and disruption of services. The blast radius of this vulnerability is extensive given its network exploitability and the nature of the ajaxpro.2 package, which may be integrated into critical applications.
Organizations should address this vulnerability in their priority patch cycle due to its high CVSS score and the availability of public exploits. The urgency is underscored by the fact that the EPSS score is 0.877, indicating a high probability of exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to the vendor patch are affected by this vulnerability. Specific attention should be given to versions of ajaxpro.2 below 21.10.30.1.
Mitigation & Remediation
Organizations should implement the latest vendor patches to remediate this vulnerability. Upgrading to version 21.10.30.1 or later is recommended. In scenarios where patching is not immediately feasible, consider implementing workarounds such as disabling features that utilize deserialization processes, enhancing input validation, and applying strict data access controls.
To further mitigate risks, organizations can benefit from conducting regular security assessments, including application security assessments, which can help identify potential vulnerabilities in their systems.
Detection Guidance
To detect exploitation attempts, organizations should monitor logs for unusual deserialization events and application errors that may indicate an exploit attempt. Behavioral anomalies such as unexpected application crashes or unauthorized data access attempts should also be investigated.
AppSecure Threat Intelligence Insight
CVE-2021-23758 serves as a critical reminder of the importance of secure coding practices, particularly regarding deserialization. Organizations must remain vigilant and ensure that their development teams are aware of the risks associated with deserialization vulnerabilities.
This vulnerability highlights a trend in software development where deserialization processes can be exploited if not properly secured. Security teams should reflect on this incident to enhance their coding standards and vulnerability management practices.
For comprehensive security improvement, organizations may consider implementing continuous penetration testing services to proactively identify and mitigate vulnerabilities like CVE-2021-23758.
For more insights on continuous testing, refer to our article on continuous penetration testing and its benefits in identifying software vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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