CVE-2019-3721 Explained : Impact and Mitigation

Dell EMC Open Manage System Administrator (OMSA) versions prior to 9.3.0 are affected by an Improper Range Header Processing Vulnerability, allowing remote attackers to crash the system through manipulated requests.

Understanding CVE-2019-3721

This CVE involves a vulnerability in Dell EMC Open Manage System Administrator (OMSA) versions before 9.3.0, leading to a system crash due to excessive memory usage.

What is CVE-2019-3721?

The Improper Range Header Processing Vulnerability in Dell EMC OMSA allows unauthenticated remote attackers to send manipulated requests with overlapping ranges, causing the system to crash by compressing each requested byte.

The Impact of CVE-2019-3721

CVSS Base Score: 4.3 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: Low
The vulnerability does not impact confidentiality or integrity but can lead to system unavailability.

Technical Details of CVE-2019-3721

Vulnerability Description

The vulnerability in Dell EMC OMSA versions prior to 9.3.0 allows remote attackers to crash the system by sending manipulated requests with overlapping ranges.

Affected Systems and Versions

Affected Product: Open Manage System Administrator
Vendor: Dell EMC
Affected Versions: < 9.3.0

Exploitation Mechanism

Attackers exploit this vulnerability by sending crafted requests with overlapping ranges, causing the application to compress each requested byte, leading to a system crash.

Mitigation and Prevention

Immediate Steps to Take

Update Dell EMC OMSA to version 9.3.0 or later to mitigate the vulnerability.
Monitor network traffic for any suspicious activity targeting this vulnerability.

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply security patches provided by Dell EMC to address the Improper Range Header Processing Vulnerability.