CVE-2020-3565
Last modified
CVE-2020-3565 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. A vulnerability in the TCP Intercept functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Access Control Policies (including Geolocation) and Service Polices on an affected system. The vulnerability exists because TCP Intercept is invoked when the embryonic connection limit is reached, which can cause the underlying detection engine to process the packet incorrectly. EPSS estimates a 0.94% chance of exploitation in the next 30 days.
Description
A vulnerability in the TCP Intercept functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Access Control Policies (including Geolocation) and Service Polices on an affected system. The vulnerability exists because TCP Intercept is invoked when the embryonic connection limit is reached, which can cause the underlying detection engine to process the packet incorrectly. An attacker could exploit this vulnerability by sending a crafted stream of traffic that matches a policy on which TCP Intercept is configured. A successful exploit could allow the attacker to match on an incorrect policy, which could allow the traffic to be forwarded when it should be dropped. In addition, the traffic could incorrectly be dropped.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Secure Firewall Threat Defense | < 6.4.0.8 |
| Cisco | Secure Firewall Threat Defense | >= 6.5.0, < 6.5.0.4 |
| Cisco | Secure Firewall Threat Defense | >= 6.5.0.5, < 6.6.0 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
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