CVE-2021-1256: Cisco Firepower Threat Defense Software Command File Overwrite Vulnerability
First published: Thu Apr 29 2021(Updated: )
A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite files on the file system of an affected device by using directory traversal techniques. A successful exploit could cause system instability if important system files are overwritten. This vulnerability is due to insufficient validation of user input for the file path in a specific CLI command. An attacker could exploit this vulnerability by logging in to a targeted device and issuing a specific CLI command with crafted user input. A successful exploit could allow the attacker to overwrite arbitrary files on the file system of the affected device. The attacker would need valid user credentials on the device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Secure Firewall Threat Defense | <=6.4.0 | |
| Cisco Secure Firewall Threat Defense | >=6.6.0<6.6.4 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-1256?
CVE-2021-1256 is considered a high severity vulnerability.
How does CVE-2021-1256 impact Cisco Firepower Threat Defense?
CVE-2021-1256 allows an authenticated, local attacker to overwrite files on the system, potentially causing instability.
How do I fix CVE-2021-1256?
To mitigate CVE-2021-1256, update Cisco Firepower Threat Defense Software to version 6.4.0 or later, or to a patched version in the 6.6.x range.
Who is affected by CVE-2021-1256?
CVE-2021-1256 affects Cisco Firepower Threat Defense versions up to 6.4.0 and between 6.6.0 and 6.6.4.
What types of attacks can CVE-2021-1256 facilitate?
CVE-2021-1256 can facilitate file overwrite attacks using directory traversal techniques by authenticated, local attackers.
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