CVE-2021-21479 is a critical vulnerability affecting SAP's SCIMono component, prior to version 0.0.19. This vulnerability allows an attacker to inject and execute Java expressions, potentially compromising both the availability and integrity of the system. With a CVSS score of 9.1, the severity of this vulnerability necessitates immediate attention from organizations utilizing SAP SCIMono.
The implications of this vulnerability are severe, as it can lead to unauthorized access and manipulation of sensitive data. Given the critical nature of the systems that may rely on SCIMono, the risk to organizations includes potential data breaches, loss of system integrity, and service disruptions.
Currently, there is no known public exploit for this vulnerability. However, attackers may leverage the availability of this vulnerability in environments that have not yet applied the necessary patches. Organizations should prioritize patching immediately to safeguard their systems.
In conclusion, CVE-2021-21479 represents a critical threat to any organization utilizing SCIMono. It is essential that organizations assess their exposure and take swift action to implement the required updates.
Vulnerability Details
In SCIMono before 0.0.19, it is possible for an attacker to inject and execute Java expressions compromising the availability and integrity of the system.
The CVSS score for this vulnerability is 9.1, classified as critical, highlighting the urgent need for remediation. The affected product is SCIMono, provided by SAP, with a publication date of February 9, 2021. This vulnerability is classified under CWE-74.
Technical Analysis
The root cause of CVE-2021-21479 lies in insufficient validation of user input, allowing for Java expression injection. The attack vector is network-based, meaning that attackers can exploit this vulnerability remotely without physical access to the affected system.
The attack complexity is low, as no special conditions are required to exploit the vulnerability. Additionally, the vulnerability does not require any privileges to exploit, nor does it necessitate user interaction. The confidentiality impact is negligible, but the integrity and availability impacts are high, emphasizing the critical nature of this vulnerability.
Risk & Impact Analysis
Organizations using SCIMono face significant risks due to CVE-2021-21479. The ability of an attacker to execute arbitrary Java code can lead to unauthorized operations, data corruption, and loss of service. The urgency of addressing this vulnerability is underscored by its CVSS score of 9.1, indicating that it should be prioritized in patch management cycles.
The blast radius for organizations that fail to address this vulnerability could be extensive, considering the potential for widespread service disruptions and data integrity issues. Organizations should consider implementing additional security measures to monitor for unusual activity that may indicate exploitation attempts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of SCIMono prior to 0.0.19. Organizations are advised to upgrade to the latest version to mitigate risk.
Mitigation & Remediation
Organizations should apply the latest patches for SCIMono immediately. It is critical to upgrade to version 0.0.19 or later to close this vulnerability. If patches cannot be applied right away, organizations should consider implementing additional security controls, such as input validation and monitoring for suspicious activities.
For ongoing security assurance, organizations may benefit from penetration testing to identify any existing vulnerabilities.
Detection Guidance
Organizations should monitor logs for any unusual Java execution attempts or related anomalies. Additionally, network traffic should be analyzed for any suspicious patterns that may indicate exploitation attempts. Regular security audits can also help in identifying and mitigating similar vulnerabilities.
AppSecure Threat Intelligence Insight
CVE-2021-21479 illustrates the ongoing risk that vulnerabilities in widely used components can pose to organizations. The high CVSS score indicates the potential for severe impact, reinforcing the need for proactive vulnerability management. Security teams should prioritize understanding their dependencies and ensure that they are not using outdated or vulnerable components.
For further insights on vulnerability management, organizations can explore resources on designing an effective vulnerability management program and best practices in penetration testing. Additionally, organizations should stay informed about emerging threats in the landscape through continuous education and training.
Ultimately, adopting a proactive approach to security can significantly reduce the risk presented by vulnerabilities like CVE-2021-21479.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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