Protection Mechanism Failure in Cisco Firewall Threat Defense (FTD) - CVE-2020-3285
Published: May 7, 2020
Vulnerability identifier: #VU27583
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-3285
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Firewall Threat Defense (FTD)
Cisco Firewall Threat Defense (FTD)
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to a logic error with Snort handling of the connection with the Transport Layer Security (version 1.3) policy and URL category configuration. A remote attacker can send a specially crafted TLS connections to an affected device, bypass the TLS policy and access URLs that are outside the affected device and normally would be dropped.
How to mitigate CVE-2020-3285
Vendor recommends to update the Cisco FTD Software Release to version 6.4.0.9, scheduled for May 2020.