CVE-2021-35245 is a high-severity vulnerability identified in SolarWinds Serv-U, a widely used file transfer and management solution. This vulnerability allows users with admin rights in the Serv-U Console to move, create, and delete any files that can be accessed on the Serv-U host machine. The potential for misuse presents significant risks to organizations utilizing this software.
The CVSS score of 8.4 categorizes this vulnerability as high severity, indicating a serious threat level. The implications of such vulnerabilities can lead to unauthorized access to sensitive information, loss of data integrity, and potential service interruptions. Organizations are urged to take immediate steps to address this vulnerability.
Currently, there is no public exploit confirmed for this vulnerability, but the nature of the issue means attackers may attempt to leverage it if left unaddressed. Organizations should prioritize patching to mitigate risks associated with this vulnerability.
Organizations should prioritize patching immediately. This vulnerability not only exposes critical operations but also increases the risk of data breaches and operational downtime, making swift remediation essential.
Vulnerability Details
According to the official description, CVE-2021-35245 allows users with admin rights in the Serv-U Console to manipulate files accessible on the host machine. This vulnerability is classified under CWE-284, which denotes improper access control. The CVSS version 3.1 score of 8.4 reflects its serious nature, with high impacts on confidentiality, integrity, and availability.
The vulnerability affects all versions of SolarWinds Serv-U prior to 15.2.4 and includes the hotfix version of 15.2.4 as well as version 15.2.5. Organizations must ensure that they are operating on patched versions to mitigate this vulnerability effectively.
Technical Analysis
The root cause of CVE-2021-35245 lies in improper access controls within the Serv-U Console. The vulnerability has a low attack complexity and requires high privileges, meaning that an attacker must already have administrative access to exploit it. User interaction is required, as the attacker must trick the authorized user into executing malicious actions.
Due to the nature of the vulnerability, the attack vector is classified as network-based. The potential impacts include a high risk to confidentiality and integrity, as well as availability. Organizations should be aware that this vulnerability can lead to severe damage if exploited.
Risk & Impact Analysis
The risk to organizations includes unauthorized file manipulation, data breaches, and potential loss of sensitive information. Given the high severity and the potential for significant operational disruptions, it is critical that organizations assess their exposure to this vulnerability. The blast radius is extensive, impacting all instances of Serv-U that have not been patched.
Organizations should address this vulnerability in their priority patch cycle. The potential for exploitation underscores the importance of a robust vulnerability management program to mitigate risks effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of SolarWinds Serv-U prior to 15.2.4, including the hotfix version 15.2.4 and version 15.2.5. Organizations should upgrade to the latest versions to address this vulnerability.
Mitigation & Remediation
SolarWinds has released patches to remediate this vulnerability. Organizations must ensure they update to the latest version of Serv-U to mitigate the risks associated with CVE-2021-35245. If a patch is not available, organizations should consider implementing configuration hardening to limit file access and monitor for any suspicious activities.
For more insights, organizations can refer to the following resources for best practices in vulnerability management: penetration testing and application security assessments to enhance overall security posture.
Detection Guidance
Organizations should monitor logs for unusual file access patterns, especially from users with administrative rights. Behavioral anomalies indicating unauthorized actions should also be flagged. Regular audits of user permissions and access controls can help in identifying and mitigating potential risks.
AppSecure Threat Intelligence Insight
The emergence of CVE-2021-35245 underscores the importance of robust access controls in software applications. This vulnerability exemplifies how improper permission settings can lead to significant security risks. Security teams should take this opportunity to review and enhance their access control policies, ensuring that administrative rights are granted judiciously.
For organizations utilizing SolarWinds products, staying informed about security advisories is crucial. The pattern of vulnerabilities related to access control highlights the need for ongoing vigilance and proactive measures. Engage in regular security assessments, and consider employing services like red teaming to simulate potential attack scenarios and strengthen defenses.
In conclusion, organizations are encouraged to take immediate action to address this vulnerability, ensuring that security measures are in place to mitigate risks associated with improper access controls.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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