CVE-2021-34753 Cisco Firepower Threat Defense Ethernet Industrial Protocol Policy Bypass Vulnerabilities
An unauthenticated remote attacker can bypass configured access control and intrusion policies for ENIP traffic by sending crafted packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34753?
CVE-2021-34753 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. This vulnerability is due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit this vulnerability by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should trigger and drop for the ENIP packet.
Weakness: CWE-284
Which versions are affected by CVE-2021-34753?
It affects 1 product.
Products include Cisco Secure Firewall Threat Defense.
How do I fix CVE-2021-34753?
No fix has been published for CVE-2021-34753 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34753 being exploited?
There is no known exploitation of CVE-2021-34753 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Threat Defense
- CVE-2024-20412 Hardcoded credentials in Cisco Firepower Threat Defense Software
- CVE-2024-20330 Memory corruption in Cisco Firepower Threat Defense Software
- CVE-2024-20339 Cisco Firepower Threat Defense Software for Firepower 2100 Series TLS Denial of Service Vulnerability
- CVE-2024-20351 Cisco Firepower Threat Defense Software Snort Firewall Denial of Service Vulnerability
- CVE-2023-20083 Denial of service in Cisco Firepower Threat Defense Software
Sources
Also known as GHSA-4383-m935-j5wh.