CVE Catalog

CVE-2017-6766

High
Published: Translated: NVD NIST

Summary

A vulnerability in the SSL Decryption and Inspection feature of Cisco Firepower System Software may allow an unauthenticated, remote attacker to bypass the SSL policy for decrypting and inspecting traffic. The issue arises from unexpected interaction with SSL policy settings when the software receives unexpected SSL packet headers.

Risk Assessment

An attacker could exploit this vulnerability to bypass traffic inspection, potentially leading to unauthorized access to data transmitted through the system. This poses a serious security risk to the organization.

Recommendation

It is recommended to update Cisco Firepower software to the latest version to mitigate this vulnerability. Additionally, conducting an audit of SSL policies to ensure proper configuration is advisable.

Related vulnerabilities

Original NVD description (English source)

A vulnerability in the Secure Sockets Layer (SSL) Decryption and Inspection feature of Cisco Firepower System Software 5.4.0, 5.4.1, 6.0.0, 6.1.0, 6.2.0, 6.2.1, and 6.2.2 could allow an unauthenticated, remote attacker to bypass the SSL policy for decrypting and inspecting traffic on an affected system. The vulnerability is due to unexpected interaction with Known Key and Decrypt and Resign configuration settings of SSL policies when the affected software receives unexpected SSL packet headers. An attacker could exploit this vulnerability by sending a crafted SSL packet through an affected device in a valid SSL session. A successful exploit could allow the attacker to bypass the SSL decryption and inspection policy for the affected system, which could allow traffic to flow through the system without being inspected. Cisco Bug IDs: CSCve12652.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS