cisco-sa-20190501-asa-vpn-dos: Cisco Adaptive Security Appliance Software VPN Denial of Service Vulnerability
First published: Wed May 01 2019(Updated: )
A vulnerability in the remote access VPN session manager of Cisco Adaptive Security Appliance (ASA) Software could allow a unauthenticated, remote attacker to cause a denial of service (DoS) condition on the remote access VPN services. The vulnerability is due to an issue with the remote access VPN session manager. An attacker could exploit this vulnerability by requesting an excessive number of remote access VPN sessions. An exploit could allow the attacker to cause a DoS condition. Cisco has released software updates that address this vulnerability. There are 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-vpn-dos
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| 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 | 9.10.1.17 9.9.2.50 9.6.4.25 9.6.4.25 9.4.4.34 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190501-asa-vpn-dos?
The severity of cisco-sa-20190501-asa-vpn-dos is high due to its potential to cause a denial of service condition.
How do I fix cisco-sa-20190501-asa-vpn-dos?
To fix cisco-sa-20190501-asa-vpn-dos, upgrade to the appropriate versions of Cisco ASA Software listed in the advisory.
Who is affected by cisco-sa-20190501-asa-vpn-dos?
The cisco-sa-20190501-asa-vpn-dos vulnerability affects users of certain versions of Cisco Adaptive Security Appliance Software.
What can happen if cisco-sa-20190501-asa-vpn-dos is exploited?
If cisco-sa-20190501-asa-vpn-dos is exploited, an unauthenticated attacker can cause a denial of service on the remote access VPN services.
Is cisco-sa-20190501-asa-vpn-dos a local or remote vulnerability?
cisco-sa-20190501-asa-vpn-dos is a remote vulnerability that can be exploited without authentication.
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