CVE-2021-21517 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-21517, an XML External Entity Injection vulnerability affecting Dell SRS Policy Manager 6.X, allowing unauthorized access to system files and service disruption.
SRS Policy Manager 6.X version by Dell is affected by an XML External Entity Injection (XXE) vulnerability. This vulnerability arises due to a misconfigured XML parser that processes user-supplied DTD input without adequate validation. An attacker could exploit this vulnerability remotely to read system files and disrupt the ESRS service.
Understanding CVE-2021-21517
This section provides an overview of the CVE-2021-21517 vulnerability.
What is CVE-2021-21517?
CVE-2021-21517 is an XXE vulnerability in SRS Policy Manager 6.X by Dell, allowing remote unauthenticated attackers to potentially access system files and disrupt the ESRS service.
The Impact of CVE-2021-21517
The impact of CVE-2021-21517 is rated as High with a CVSS base score of 7.2. This vulnerability can compromise system confidentiality and availability.
Technical Details of CVE-2021-21517
This section delves into the technical aspects of CVE-2021-21517.
Vulnerability Description
The vulnerability stems from an improperly configured XML parser that lacks validation for user-supplied DTD input, enabling attackers to exploit XXE attacks.
Affected Systems and Versions
SRS Policy Manager 6.X versions prior to 7.0 are affected by this vulnerability.
Exploitation Mechanism
Remote unauthenticated attackers can exploit this vulnerability by submitting crafted XML requests to the affected system, potentially leading to data exposure and service disruption.
Mitigation and Prevention
Explore the following strategies to mitigate and prevent exploitation of CVE-2021-21517.
Immediate Steps to Take
Immediately update SRS Policy Manager to version 7.0 or higher, or apply patches provided by Dell to remediate this vulnerability.
Long-Term Security Practices
Employ secure coding practices and restrict access to ensure a robust security posture against XXE vulnerabilities.
Patching and Updates
Regularly apply security patches and updates to all software components to address known vulnerabilities and enhance overall system security.