CVE-2019-1695
MediumCVSS 6.5Exploitation Probability (EPSS)
Elevated risk50th percentile - higher than 50% of all known CVEs
Summary
A vulnerability in the detection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to send data directly to the kernel of an affected device. The issue is due to improper filtering of Ethernet frames. An attacker could exploit this by sending crafted packets to the management interface, bypassing Layer 2 filters.
Risk Assessment
The risk is that an attacker can bypass Layer 2 filters and deliver malicious data to the kernel, potentially compromising device integrity.
Recommendation
Apply Cisco updates for ASA and FTD. Restrict access to the management interface and monitor for unusual Ethernet traffic.
Original NVD description (English source)
A vulnerability in the detection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to send data directly to the kernel of an affected device. The vulnerability exists because the software improperly filters Ethernet frames sent to an affected device. An attacker could exploit this vulnerability by sending crafted packets to the management interface of an affected device. A successful exploit could allow the attacker to bypass the Layer 2 (L2) filters and send data directly to the kernel of the affected device. A malicious frame successfully delivered would make the target device generate a specific syslog entry.