CVE-2021-32682 describes a critical vulnerability in the std42 elFinder file manager, specifically affecting version 2.1.58. This vulnerability allows attackers to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with minimal configuration. With a CVSS score of 9.8, this vulnerability poses a severe risk to organizations using the affected software.
The vulnerability is classified as critical due to its potential for high impact on confidentiality, integrity, and availability. Attackers may leverage this flaw to gain unauthorized access to sensitive information or disrupt services, making it essential for organizations to understand the urgency of this issue.
As of now, no known exploits are actively being used in the wild, but the high severity indicates that organizations should prioritize patching immediately. The vulnerabilities were patched in version 2.1.59 of elFinder, and it is crucial to apply this update to mitigate risk.
To protect against potential attacks, organizations should ensure that the elFinder connector is not exposed without proper authentication, as this can serve as a significant attack vector.
Vulnerability Details
The official CVE description states that several vulnerabilities affect elFinder 2.1.58, which can allow an attacker to execute arbitrary code on the server. The vulnerabilities are associated with the following CWE classifications: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), CWE-78 (OS Command Injection), and CWE-918 (Use of Web Link to Redirect to Untrusted Site).
The CVSS score of 9.8 classifies this vulnerability as critical, indicating a high risk. The attack vector is network-based, with low complexity and no required privileges, meaning that an attacker can exploit this vulnerability without needing to authenticate.
elFinder version 2.1.58 is the only affected version, and it is crucial to upgrade to version 2.1.59 or later to mitigate this vulnerability. The vulnerability was published on June 14, 2021, and has since been modified.
Technical Analysis
The root cause of this vulnerability stems from insufficient input validation, which allows attackers to inject arbitrary commands into the server through the elFinder PHP connector. The attack vector is accessible over the network, and the complexity of the attack is low, requiring no special privileges or user interaction.
The potential impacts of successful exploitation include high confidentiality impact, integrity impact, and availability impact. Organizations may face unauthorized access to sensitive data, data modification, and service disruptions.
Risk & Impact Analysis
The deployment of elFinder in production environments carries inherent risks, particularly given the critical nature of this vulnerability. Organizations utilizing this file manager should assess their exposure and the potential blast radius of an exploitation attempt. The urgency for remediation is underscored by the CVSS score of 9.8 and the associated risks.
Organizations should prioritize remediation efforts in their patching cycles to address this vulnerability swiftly. The potential for exploitation and the resultant impact on services necessitate immediate action to secure systems and protect sensitive information.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include all versions of elFinder prior to 2.1.59. Organizations using elFinder 2.1.58 should upgrade to version 2.1.59 or later to mitigate the identified vulnerabilities.
Mitigation & Remediation
Organizations should prioritize applying the security patch provided in elFinder version 2.1.59 to remediate this vulnerability. In addition to patching, organizations should ensure that the elFinder connector is configured securely and is not exposed without proper authentication.
For organizations unable to apply the patch immediately, implementing access controls and monitoring can help mitigate risks while a permanent fix is being applied. Regular audits and security assessments can also help identify potential weaknesses in the configuration.
Application security assessments can provide organizations with insights into their security posture and help identify areas for improvement.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual activity related to the elFinder PHP connector. Behavioral anomalies, such as unexpected command executions or unauthorized access attempts, can indicate an ongoing attack.
Additionally, implementing network signatures that detect known attack patterns associated with this vulnerability can enhance overall security. Regularly reviewing and updating detection rules based on the latest threat intelligence is also recommended.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-32682 highlights the importance of robust security practices in web application development. As vulnerabilities continue to emerge, organizations must remain vigilant and proactive in their security measures.
The pattern observed with elFinder vulnerabilities reflects a broader trend of web-based applications being targeted for exploitation. Security teams should take note of this trend and implement comprehensive security measures to mitigate risks.
Organizations can benefit from integrating continuous security testing into their development processes to identify vulnerabilities early. Engaging in penetration testing can provide valuable insights and help establish a more secure application environment.
In conclusion, CVE-2021-32682 serves as a reminder of the evolving threat landscape organizations face. Security teams should prioritize learning from these incidents to strengthen defenses and maintain resilience against future vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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