CVE-2017-12300 Security feature bypass in Cisco Firepower System Software
An unauthenticated remote attacker can bypass SMB2 blocking policies in Cisco Firepower by sending crafted requests, requiring specific file policy configurations.
- 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-2017-12300?
CVE-2017-12300 is a medium-severity vulnerability in Cisco Secure Firewall Management Center, published on 16 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the SNORT detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a file policy that is configured to block the Server Message Block Version 2 (SMB2) protocol. The vulnerability is due to the incorrect detection of an SMB2 file when the detection is based on the length of the file. An attacker could exploit this vulnerability by sending a crafted SMB2 transfer request through the targeted device. A successful exploit could allow the attacker to bypass filters that are configured to block SMB2 traffic. Cisco Bug IDs: CSCve58398.
Weakness: CWE-20
Which versions are affected by CVE-2017-12300?
It affects 1 product.
Products include Cisco Secure Firewall Management Center.
How do I fix CVE-2017-12300?
No fix has been published for CVE-2017-12300 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-12300 being exploited?
There is no known exploitation of CVE-2017-12300 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Management Center
- CVE-2026-20079 Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel
- CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data
- CVE-2026-20316 Cisco Secure Firewall Management Center Use of Hard-coded Password
- CVE-2025-20265 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability
- CVE-2024-20424 Command injection in Cisco Firepower Management Center
Sources
Also known as GHSA-v68r-xxfh-w776.