CVE-2021-43972 : Vulnerability Insights and Analysis

An unrestricted file copy vulnerability in /UserSelfServiceSettings.jsp in SysAid ITIL 20.4.74 b10 allows a remote authenticated attacker to copy arbitrary files on the server filesystem to the web root (with an arbitrary filename) via the tempFile and fileName parameters in the HTTP POST body.

Understanding CVE-2021-43972

What is CVE-2021-43972?

CVE-2021-43972 denotes an unrestricted file copy vulnerability in SysAid ITIL version 20.4.74 b10 that permits a remote authenticated attacker to copy arbitrary files to the server filesystem's web root using specific HTTP POST parameters.

The Impact of CVE-2021-43972

This vulnerability allows an attacker to compromise the server's integrity by copying files to sensitive locations, potentially leading to unauthorized access or data leakage.

Technical Details of CVE-2021-43972

Vulnerability Description

The vulnerability lies in /UserSelfServiceSettings.jsp in SysAid ITIL 20.4.74 b10, enabling the file copying process by manipulating the tempFile and fileName parameters in the HTTP POST body.

Affected Systems and Versions

Vendor: SysAid ITIL
Version: 20.4.74 b10

Exploitation Mechanism

The attacker, with remote authenticated access, can leverage the tempFile and fileName parameters through the HTTP POST request to copy files to the server filesystem's web root.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches from the vendor promptly.
Monitor server logs for any suspicious file copying activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict file system access.
Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Regularly update and patch both the ITIL software and the underlying server to mitigate the risk of file copy vulnerabilities.