cisco-sa-20190501-asa-ftd-dos: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability
First published: Wed May 01 2019(Updated: )
A vulnerability in the WebVPN service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper management of authenticated sessions in the WebVPN portal. An attacker could exploit this vulnerability by authenticating with valid credentials and accessing a specific URL in the WebVPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a temporary DoS condition. 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-20190501-asa-ftd-dos
Credit: Qian Chen Qihoo 360 Information Security Department
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | =9.10<9.10.1.17>=9.7=9.8<=9.9<9.9.2.50=9.6<9.6.4.25=9.5<9.6.4.25=9.4<9.4.4.34=Prior to 9.4<9.4.4.34 | 9.10.1.17 9.9.2.50 9.6.4.25 9.6.4.25 9.4.4.34 9.4.4.34 |
| Cisco FTD Software | =6.2.3<6.2.3.12=6.2.2<6.2.3.12=6.2.1<6.2.3.12 | 6.2.3.12 6.2.3.12 6.2.3.12 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190501-asa-ftd-dos?
The severity of cisco-sa-20190501-asa-ftd-dos is high due to its potential to cause a denial of service condition.
How do I fix cisco-sa-20190501-asa-ftd-dos?
To fix cisco-sa-20190501-asa-ftd-dos, upgrade to the latest patched version of Cisco ASA Software or Cisco FTD Software as recommended in the advisory.
Who is affected by cisco-sa-20190501-asa-ftd-dos?
Cisco ASA Software and Cisco FTD Software users running versions prior to the specified patched releases are affected by cisco-sa-20190501-asa-ftd-dos.
What is the attack vector for cisco-sa-20190501-asa-ftd-dos?
The attack vector for cisco-sa-20190501-asa-ftd-dos is remote authenticated access to the WebVPN service.
Can cisco-sa-20190501-asa-ftd-dos be exploited remotely?
Yes, cisco-sa-20190501-asa-ftd-dos can be exploited by an authenticated remote attacker.
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