Improper input validation in Cisco Adaptive Security Appliance (ASA) - CVE-2018-15397
Published: October 14, 2018
Vulnerability identifier: #VU15358
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-15397
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists in the implementation of Traffic Flow Confidentiality (TFC) over IPsec functionality due to an error during renegotiating of the encryption key for an IPsec tunnel when certain TFC traffic is in flight. A remote attacker can send a malicious stream of TFC traffic through an established IPsec tunnel and cause a daemon process on the affected device to crash.
The weakness exists in the implementation of Traffic Flow Confidentiality (TFC) over IPsec functionality due to an error during renegotiating of the encryption key for an IPsec tunnel when certain TFC traffic is in flight. A remote attacker can send a malicious stream of TFC traffic through an established IPsec tunnel and cause a daemon process on the affected device to crash.
How to mitigate CVE-2018-15397
Install update from vendor's website.