CVE-2021-26293 : Security Advisory and Response
Learn about CVE-2021-26293, a directory traversal vulnerability in AfterLogic Aurora and WebMail Pro enabling attackers to create new files, including executables. Find mitigation steps here.
An issue was discovered in AfterLogic Aurora through 8.5.3 and WebMail Pro through 8.5.3, when DAV is enabled, allowing directory traversal to create new files, including executable files under the web root.
Understanding CVE-2021-26293
This CVE refers to a directory traversal vulnerability in AfterLogic Aurora and WebMail Pro when DAV is enabled, potentially leading to the creation of new files, such as executable files.
What is CVE-2021-26293?
CVE-2021-26293 highlights a security flaw that enables attackers to conduct directory traversal attacks, ultimately allowing them to create new files within the web application's file system.
The Impact of CVE-2021-26293
This vulnerability could be exploited by malicious actors to upload malicious files, execute arbitrary code, or compromise the integrity of the affected systems, posing a significant risk to the confidentiality and availability of data.
Technical Details of CVE-2021-26293
The technical details of CVE-2021-26293 include:
Vulnerability Description
The vulnerability allows an attacker to traverse directories and create new files, including executable ones, by leveraging the DAV feature in AfterLogic Aurora and WebMail Pro.
Affected Systems and Versions
AfterLogic Aurora versions through 8.5.3 and WebMail Pro versions through 8.5.3 are affected when DAV is enabled.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending crafted requests that traverse directories and create malicious files, potentially leading to remote code execution.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-26293, consider the following:
Immediate Steps to Take
- Disable DAV functionality if not strictly required.
- Implement strong input validation to prevent directory traversal attacks.
Long-Term Security Practices
- Regularly update the software to the latest patched versions.
- Conduct security assessments to identify and remediate similar vulnerabilities proactively.
Patching and Updates
Ensure that you apply security patches provided by AfterLogic promptly to address this vulnerability and protect your systems.