cisco-sa-20190501-asa-ipsec-dos: Cisco Adaptive Security Appliance Software IPsec Denial of Service Vulnerability
First published: Wed May 01 2019(Updated: )
A vulnerability in the software cryptography module of the Cisco Adaptive Security Virtual Appliance (ASAv) and Firepower 2100 Series running Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause an unexpected reload of the device that results in a denial of service (DoS) condition. The vulnerability is due to a logic error with how the software cryptography module handles IPsec sessions. An attacker could exploit this vulnerability by creating and sending traffic in a high number of IPsec sessions through the targeted device. A successful exploit could cause the device to reload and result in a 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-ipsec-dos
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA | =9.9<9.9.2.50 | 9.9.2.50 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20190501-asa-ipsec-dos?
The severity of cisco-sa-20190501-asa-ipsec-dos is considered high due to the potential for an unauthenticated remote attack leading to device reloads.
How do I fix cisco-sa-20190501-asa-ipsec-dos?
To fix cisco-sa-20190501-asa-ipsec-dos, update your Cisco ASA Software to a version that is above 9.9.2.50.
Who is affected by cisco-sa-20190501-asa-ipsec-dos?
Devices running Cisco ASA Software versions up to 9.9.2.50 are affected by cisco-sa-20190501-asa-ipsec-dos.
What devices are relevant to cisco-sa-20190501-asa-ipsec-dos?
The relevant devices for cisco-sa-20190501-asa-ipsec-dos include the Cisco Adaptive Security Virtual Appliance (ASAv) and Firepower 2100 Series.
Can cisco-sa-20190501-asa-ipsec-dos be exploited remotely?
Yes, cisco-sa-20190501-asa-ipsec-dos can be exploited by an unauthenticated remote attacker.
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