CVE-2018-0243 Security feature bypass in Cisco Firepower System Software
An attacker can bypass malware detection policies to transfer malicious SMB2/SMB3 files through Cisco Firepower devices configured with file action policies.
- 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-2018-0243?
CVE-2018-0243 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense, published on 19 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured file action policy that is intended to drop the Server Message Block Version 2 (SMB2) and SMB Version 3 (SMB3) protocols if malware is detected. The vulnerability is due to incorrect detection of an SMB2 or SMB3 file based on the total file length. An attacker could exploit this vulnerability by sending a crafted SMB2 or SMB3 transfer request through the targeted device. An exploit could allow the attacker to pass SMB2 or SMB3 files that could be malware even though the device is configured to block them. This vulnerability does not exist for SMB Version 1 (SMB1) files. This vulnerability affects Cisco Firepower System Software when one or more file action policies are configured, on software releases prior to 6.2.3. Cisco Bug IDs: CSCvg68807.
Weakness: CWE-693
Which versions are affected by CVE-2018-0243?
It affects 1 product.
Products include Cisco Secure Firewall Threat Defense.
How do I fix CVE-2018-0243?
No fix has been published for CVE-2018-0243 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-0243 being exploited?
There is no known exploitation of CVE-2018-0243 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-522c-wx8c-28p2.