XML files are complex data structures. When a malicious user is able to submit an XML file, it triggers complex processing that may overwhelm the
parser. Most of the time, those complex processing are enabled by default, and XML parsers do not take preventive measures against Denial of Service
attacks.
What is the potential impact?
When an attacker successfully exploits the vulnerability, it can lead to a Denial of Service (DoS) condition.
System Unavailability
Affected system becomes unresponsive or crashes, rendering it unavailable to legitimate users. This can have severe consequences, especially for
critical systems that rely on continuous availability, such as web servers, APIs, or network services.
Amplification Attacks
In some cases, XML parsers Denial of Service attacks can be used as a part of larger-scale amplification attacks. By leveraging the vulnerability,
attackers can generate a disproportionately large response from the targeted system, amplifying the impact of their attack. This can result in
overwhelming network bandwidth and causing widespread disruption.
