CVE-2018-0244 Security feature bypass in Cisco Firepower System Software

Medium 5.8 Published Updated

An attacker can bypass malware detection policies to deliver malicious files via SMB transfers on Cisco Firepower devices.

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-2018-0244?

CVE-2018-0244 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 to drop the Server Message Block (SMB) protocol if a malware file is detected. The vulnerability is due to how the SMB protocol handles a case in which a large file transfer fails. This case occurs when some pieces of the file are successfully transferred to the remote endpoint, but ultimately the file transfer fails and is reset. An attacker could exploit this vulnerability by sending a crafted SMB file transfer request through the targeted device. An exploit could allow the attacker to pass an SMB file that contains malware, which the device is configured to block. 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: CSCvc20141.

Weakness: CWE-693

Which versions are affected by CVE-2018-0244?

It affects 1 product.

Products include Cisco Secure Firewall Threat Defense.

How do I fix CVE-2018-0244?

No fix has been published for CVE-2018-0244 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-0244 being exploited?

There is no known exploitation of CVE-2018-0244 in the wild and no public exploit code.

All Cisco Secure Firewall Threat Defense vulnerabilities

Sources

Also known as GHSA-pfr7-hwqp-3m5f.

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