cisco-sa-asaftd-ftpbypass-HY3UTxYu: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software FTP Inspection Bypass Vulnerability
First published: Wed Oct 21 2020(Updated: )
Update from October 22nd, 2020: Cisco has become aware of a new Cisco Adaptive Security Appliance vulnerability that could affect the fixed releases recommended for code trains 9.13 and 9.14 in the Fixed Software section of this advisory. See the Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability for additional information. A vulnerability in the FTP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass FTP inspection. The vulnerability is due to ineffective flow tracking of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and successfully complete FTP connections. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ftpbypass-HY3UTxYu
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | =9.14<9.14.1.19=9.13<9.13.1.13=9.12<9.12.4.2=9.10<9.10.1.44=9.9<9.9.2.80>=Earlier than 9.6=9.6=9.7<=9.8<9.8.4.26 | 9.14.1.19 9.13.1.13 9.12.4.2 9.10.1.44 9.9.2.80 9.8.4.26 |
| Cisco FTD Software | >=Earlier than 6.2.2=6.2.2=6.2.3=6.3.0<=6.4.0<6.4.0.10 | 6.4.0.10 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco security advisory?
The vulnerability ID for this Cisco security advisory is cisco-sa-asaftd-ftpbypass-HY3UTxYu.
What is the severity of the vulnerability?
The severity of the vulnerability is medium with a CVSS score of 5.8.
Which software versions are affected by this vulnerability?
The Cisco ASA Software versions 9.14, 9.13, 9.12, 9.10, 9.9, and earlier, as well as Cisco FTD Software versions earlier than 6.2.2, 6.2.3, 6.3.0, and 6.4.0 are affected by this vulnerability.
How can I fix this vulnerability?
To fix this vulnerability, you should upgrade to the fixed software releases recommended by Cisco, which are listed in the Fixed Software section of the advisory.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability in the Cisco security advisory at the following link: [Cisco Security Advisory cisco-sa-asaftd-ftpbypass-HY3UTxYu](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ftpbypass-HY3UTxYu).
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