CVE-2018-15397: Cisco Adaptive Security Appliance IPsec VPN Denial of Service Vulnerability
First published: Fri Oct 05 2018(Updated: )
A vulnerability in the implementation of Traffic Flow Confidentiality (TFC) over IPsec functionality in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error that may occur if the affected software renegotiates the encryption key for an IPsec tunnel when certain TFC traffic is in flight. An attacker could exploit this vulnerability by sending a malicious stream of TFC traffic through an established IPsec tunnel on an affected device. A successful exploit could allow the attacker to cause a daemon process on the affected device to crash, which could cause the device to crash and result in a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Secure Firewall Management Center | =6.2.2 | |
| Cisco Adaptive Security Appliance Software | =9.6.4 | |
| Cisco Adaptive Security Appliance Software | =9.8.2 | |
| Cisco Adaptive Security Appliance Software | =9.9.1 | |
| Cisco Adaptive Security Appliance Software | =9.9.1\(1\) | |
| Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software | =6.2.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-15397?
CVE-2018-15397 has been rated as a Medium severity vulnerability.
How do I fix CVE-2018-15397?
To fix CVE-2018-15397, upgrade to a fixed software version provided by Cisco.
Which Cisco products are affected by CVE-2018-15397?
CVE-2018-15397 affects Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software.
Can CVE-2018-15397 be exploited remotely?
Yes, CVE-2018-15397 can be exploited by unauthenticated remote attackers.
What impact does CVE-2018-15397 have on affected devices?
CVE-2018-15397 may allow an attacker to cause a denial of service condition on the affected devices.
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- canonical/cisco secure firewall management center
- version/cisco secure firewall management center/6.2.2
- canonical/cisco adaptive security appliance software
- version/cisco adaptive security appliance software/9.6.4
- version/cisco adaptive security appliance software/9.8.2
- version/cisco adaptive security appliance software/9.9.1
- version/cisco adaptive security appliance software/9.9.1\(1\)
- canonical/cisco firepower management center (fmc) and firepower threat defense (ftd) software
- version/cisco firepower management center (fmc) and firepower threat defense (ftd) software/6.2.2