cisco-sa-20191002-asa-ftd-ikev1-dos: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IKEv1 Denial of Service Vulnerability
First published: Wed Oct 02 2019(Updated: )
A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper management of system memory. An attacker could exploit this vulnerability by sending malicious IKEv1 traffic to an affected device. The attacker does not need valid credentials to authenticate the VPN session, nor does the attacker's source address need to match a peer statement in the crypto map applied to the ingress interface of the affected device. An exploit could allow the attacker to exhaust system memory resources, leading to a reload of an affected device. 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-20191002-asa-ftd-ikev1-dos
Credit: This vulnerability was found during the resolution a Cisco TAC support case
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA | =9.12<9.12.2=9.10<9.10.1.17=9.9<9.9.2.47>=9.7<=9.8<9.8.3.26 | 9.12.2 9.10.1.17 9.9.2.47 9.8.3.26 |
| Cisco Firepower Threat Defense | >=6.2.0=6.2.1=6.2.2<=6.2.3<6.2.3.11 | 6.2.3.11 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20191002-asa-ftd-ikev1-dos?
The severity of cisco-sa-20191002-asa-ftd-ikev1-dos is classified as high, due to the potential for remote denial of service.
How does cisco-sa-20191002-asa-ftd-ikev1-dos affect devices?
cisco-sa-20191002-asa-ftd-ikev1-dos allows an unauthenticated remote attacker to trigger a reload of affected Cisco devices.
How do I fix cisco-sa-20191002-asa-ftd-ikev1-dos?
To fix cisco-sa-20191002-asa-ftd-ikev1-dos, upgrade to the recommended secure versions of Cisco ASA or FTD Software as outlined in the advisory.
Which products are affected by cisco-sa-20191002-asa-ftd-ikev1-dos?
cisco-sa-20191002-asa-ftd-ikev1-dos affects Cisco ASA Software and Cisco FTD Software versions listed in the advisory.
Is there a workaround for cisco-sa-20191002-asa-ftd-ikev1-dos?
No specific workarounds are provided for cisco-sa-20191002-asa-ftd-ikev1-dos, and upgrading is recommended to mitigate the issue.
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