CVE-2020-3315
MediumCVSS 5.3Exploitation Probability (EPSS)
High risk81th percentile - higher than 81% of all known CVEs
Summary
A vulnerability in the Snort detection engine of multiple Cisco products could allow an unauthenticated, remote attacker to bypass configured file policies. The issue is due to errors in how Snort handles specific HTTP responses. An attacker could send crafted HTTP packets through an affected system, potentially bypassing policies and delivering a malicious payload.
Risk Assessment
The risk is that an attacker can bypass file policies and deliver malware to the protected network.
Recommendation
It is recommended to upgrade to a patched version and review file policy configurations.
Original NVD description (English source)
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured file policies on an affected system. The vulnerability is due to errors in how the Snort detection engine handles specific HTTP responses. An attacker could exploit this vulnerability by sending crafted HTTP packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured file policies and deliver a malicious payload to the protected network.