CVE-2021-1223 : Security Advisory and Response
Multiple Cisco products are affected by CVE-2021-1223, a vulnerability in the Snort detection engine that allows remote attackers to bypass configured file policy for HTTP.
Cisco products are affected by a vulnerability in the Snort detection engine allowing remote attackers to bypass HTTP file policies via crafted packets.
Understanding CVE-2021-1223
This CVE involves a vulnerability in multiple Cisco products due to incorrect handling of an HTTP range header, allowing attackers to bypass configured file policies for HTTP.
What is CVE-2021-1223?
The vulnerability in the Snort detection engine of Cisco products enables unauthenticated remote attackers to bypass a configured file policy for HTTP by exploiting a flaw in the HTTP range header handling.
The Impact of CVE-2021-1223
An attacker could send specially crafted HTTP packets through the affected device to deliver a malicious payload, circumventing configured file policies for HTTP.
Technical Details of CVE-2021-1223
This section provides a deeper insight into the vulnerability.
Vulnerability Description
The vulnerability is rooted in the incorrect handling of the HTTP range header in the Snort detection engine, which can be exploited by attackers to bypass HTTP file policies.
Affected Systems and Versions
Cisco Firepower Threat Defense Software is among the affected products, although the specific versions are not explicitly mentioned in the data.
Exploitation Mechanism
Attackers can leverage this vulnerability by sending carefully crafted HTTP packets through the impacted device, allowing them to bypass configured file policies for HTTP and deliver harmful payloads.
Mitigation and Prevention
To secure systems against CVE-2021-1223, the following measures can be implemented.
Immediate Steps to Take
Ensure that appropriate security protocols are in place, such as network segmentation and access controls, to minimize the risk of exploitation.
Long-Term Security Practices
Regularly update and patch systems to address vulnerabilities promptly, conduct security assessments, and educate users on safe internet practices to enhance overall security posture.
Patching and Updates
Stay informed about security advisories and patches released by Cisco to mitigate the risk of exploitation and enhance the resilience of the network.