Cisco Cyber Vision
Monthly
Denial of service in the Cisco Snort 3 detection engine allows remote, unauthenticated attackers to exhaust device resources and disrupt inspection services on any deployment actively processing attacker-influenced traffic - including Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS engine, Cisco Cyber Vision, and upstream Open Source Snort 3. The flaw is rooted in uncontrolled resource consumption (CWE-400) and carries a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), meaning only availability is impacted - there is no confidentiality or integrity loss and no code execution. No public exploit code or in-the-wild activity has been identified at time of analysis, and no CISA KEV listing exists; exploitation is gated by the requirement that the target actually sits inline as an IDS/IPS or firewall in a traffic-inspection path.
Remote denial of service in Cisco Snort 3-based inspection engines, including Cisco Secure Firewall Threat Defense, Cisco UTD Snort IPS Engine Software, Cisco Cyber Vision, and open-source Snort 3, allows unauthenticated remote attackers to crash or disrupt the inspection process by sending crafted traffic that triggers incorrect calculation errors (CWE-682). CVSS 3.1 scores this 7.5 High with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, so impact is availability-only with no confidentiality or integrity effect; exploitation requires the attacker's traffic to traverse an actively inspecting sensor. No KEV entry or public exploit data was supplied, and no public exploit identified at time of analysis.
Improper privilege management in Cisco Snort 3 allows a locally authenticated low-privilege attacker to escalate privileges on affected deployments, including Cisco Secure Firewall Threat Defense, Cisco UTD Snort IPS Engine, Cisco Cyber Vision, and Open Source Snort 3 installations. Exploitation requires an existing local foothold (AV:L, PR:L) with no user interaction, so the practical risk is post-compromise privilege escalation or abuse of malicious low-privilege local accounts rather than remote attack. No public exploit identified at time of analysis; no CISA KEV active-exploitation confirmation was provided.
Out-of-bounds write flaws in the Cisco Snort 3 inspection engine allow remote, unauthenticated attackers to corrupt memory in any deployment where Snort 3 parses attacker-reachable network traffic, potentially leading to arbitrary code execution or a denial-of-service condition in the inspection process. The affected code ships not only as the standalone open-source Snort 3 project but also embedded in Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS engine, and Cisco Cyber Vision, so exposure spans both Cisco appliances and third-party deployments of the open-source engine. Cisco addressed the issues through hardening releases produced during an internal security review, but the advisory groups the findings without publishing per-defect trigger details, and no public exploit code has been identified at time of analysis; CVSS AC:H reflects that an attacker must land traffic on the specific vulnerable parsing path rather than send a trivially repeatable packet.
Improper handling of nested GRE traffic in the Snort 3 Detection Engine allows unauthenticated, remote attackers to crash and restart the engine by sending a crafted GRE payload through an affected device, causing either an inspection bypass or a transient denial of service depending on how the device is configured. Affected deployments include Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS Engine, Cisco Cyber Vision, the Cisco Umbrella Insights virtual appliance, and open-source Snort 3. No public exploit code or confirmed active exploitation was identified at time of analysis; the engine restarts automatically, so disruption is transient per triggering packet, keeping this a moderate-severity availability issue rather than a top-tier priority.
Denial of service in the Cisco Snort 3 detection engine allows remote, unauthenticated attackers to exhaust device resources and disrupt inspection services on any deployment actively processing attacker-influenced traffic - including Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS engine, Cisco Cyber Vision, and upstream Open Source Snort 3. The flaw is rooted in uncontrolled resource consumption (CWE-400) and carries a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), meaning only availability is impacted - there is no confidentiality or integrity loss and no code execution. No public exploit code or in-the-wild activity has been identified at time of analysis, and no CISA KEV listing exists; exploitation is gated by the requirement that the target actually sits inline as an IDS/IPS or firewall in a traffic-inspection path.
Remote denial of service in Cisco Snort 3-based inspection engines, including Cisco Secure Firewall Threat Defense, Cisco UTD Snort IPS Engine Software, Cisco Cyber Vision, and open-source Snort 3, allows unauthenticated remote attackers to crash or disrupt the inspection process by sending crafted traffic that triggers incorrect calculation errors (CWE-682). CVSS 3.1 scores this 7.5 High with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, so impact is availability-only with no confidentiality or integrity effect; exploitation requires the attacker's traffic to traverse an actively inspecting sensor. No KEV entry or public exploit data was supplied, and no public exploit identified at time of analysis.
Improper privilege management in Cisco Snort 3 allows a locally authenticated low-privilege attacker to escalate privileges on affected deployments, including Cisco Secure Firewall Threat Defense, Cisco UTD Snort IPS Engine, Cisco Cyber Vision, and Open Source Snort 3 installations. Exploitation requires an existing local foothold (AV:L, PR:L) with no user interaction, so the practical risk is post-compromise privilege escalation or abuse of malicious low-privilege local accounts rather than remote attack. No public exploit identified at time of analysis; no CISA KEV active-exploitation confirmation was provided.
Out-of-bounds write flaws in the Cisco Snort 3 inspection engine allow remote, unauthenticated attackers to corrupt memory in any deployment where Snort 3 parses attacker-reachable network traffic, potentially leading to arbitrary code execution or a denial-of-service condition in the inspection process. The affected code ships not only as the standalone open-source Snort 3 project but also embedded in Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS engine, and Cisco Cyber Vision, so exposure spans both Cisco appliances and third-party deployments of the open-source engine. Cisco addressed the issues through hardening releases produced during an internal security review, but the advisory groups the findings without publishing per-defect trigger details, and no public exploit code has been identified at time of analysis; CVSS AC:H reflects that an attacker must land traffic on the specific vulnerable parsing path rather than send a trivially repeatable packet.
Improper handling of nested GRE traffic in the Snort 3 Detection Engine allows unauthenticated, remote attackers to crash and restart the engine by sending a crafted GRE payload through an affected device, causing either an inspection bypass or a transient denial of service depending on how the device is configured. Affected deployments include Cisco Secure Firewall Threat Defense (FTD), the Cisco UTD Snort IPS Engine, Cisco Cyber Vision, the Cisco Umbrella Insights virtual appliance, and open-source Snort 3. No public exploit code or confirmed active exploitation was identified at time of analysis; the engine restarts automatically, so disruption is transient per triggering packet, keeping this a moderate-severity availability issue rather than a top-tier priority.