CVE-2018-0297
MediumCVSS 5.8Exploitation Probability (EPSS)
Elevated risk66th percentile - higher than 66% of all known CVEs
Summary
A vulnerability in the detection engine of Cisco Firepower Threat Defense software could allow an unauthenticated, remote attacker to bypass a configured SSL Access Control (AC) policy to block SSL traffic. The issue is due to incorrect handling of TCP SSL packets received out of order. An attacker could send a crafted SSL connection through the device, bypassing the AC policy.
Risk Assessment
Bypassing SSL AC policy could allow uncontrolled SSL traffic, potentially leading to security policy violations and possible introduction of malicious traffic.
Recommendation
It is recommended to update Firepower software to patched versions and review SSL policy configurations.
Original NVD description (English source)
A vulnerability in the detection engine of Cisco Firepower Threat Defense software could allow an unauthenticated, remote attacker to bypass a configured Secure Sockets Layer (SSL) Access Control (AC) policy to block SSL traffic. The vulnerability is due to the incorrect handling of TCP SSL packets received out of order. An attacker could exploit this vulnerability by sending a crafted SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured SSL AC policy to block SSL traffic. Cisco Bug IDs: CSCvg09316.