CVE-2021-27184 : Exploit Details and Defense Strategies

A vulnerability in Pelco Digital Sentry Server 7.18.72.11464 exposes the system to an XML External Entity attack, leading to unauthorized data access through a specific file parsing method.

Understanding CVE-2021-27184

This CVE details a security flaw in a specific version of Pelco's Digital Sentry Server that enables attackers to retrieve arbitrary data through a method known as an XML External Entity vulnerability.

What is CVE-2021-27184?

CVE-2021-27184 is an XML External Entity vulnerability in Pelco Digital Sentry Server 7.18.72.11464 that allows threat actors to gain unauthorized access to sensitive data stored on the system.

The Impact of CVE-2021-27184

The vulnerability can be exploited through an out-of-band attack using a specific file within the Pelco directory, potentially resulting in data disclosure and retrieval unauthorized by the system owner.

Technical Details of CVE-2021-27184

This section outlines the specifics of the vulnerability, including affected systems, exploitation mechanisms, and versions at risk.

Vulnerability Description

The flaw arises from unsanitized input to the XML parser while parsing the ControlPointCacheShare.xml file during the execution of DSControlPoint.exe, allowing for data retrieval through an OOB attack.

Affected Systems and Versions

Pelco Digital Sentry Server version 7.18.72.11464 is specifically impacted by this vulnerability, potentially placing any system with this version at risk of data exposure.

Exploitation Mechanism

Exploitation of this vulnerability occurs through the use of DTD parameter entities, enabling threat actors to execute an out-of-band attack to access sensitive data on the affected node.

Mitigation and Prevention

To safeguard against CVE-2021-27184, immediate actions and long-term security practices are recommended to prevent unauthorized access and data breaches.

Immediate Steps to Take

System administrators should consider implementing access controls, monitoring data transfers, and restricting unnecessary file parsing to mitigate the risk of exploitation.

Long-Term Security Practices

Regular security assessments, software updates, and user training on data security best practices can help enhance overall system security and resilience.

Patching and Updates

It is crucial for Pelco Digital Sentry Server users to stay informed about security patches and updates provided by the vendor to address and remediate CVE-2021-27184.