Resource exhaustion in Cisco ASA 5500-X Series - CVE-2018-0228
Published: April 23, 2018
Vulnerability identifier: #VU12091
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-0228
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco ASA 5500-X Series
Cisco ASA 5500-X Series
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists in the ingress flow creation functionality due to incorrect handling of an internal software lock that can prevent other system processes from getting CPU cycles, causing a high CPU condition. A remote attacker can send a steady stream of malicious IP packets that can cause connections to be created, exhaust CPU resources and cause the service to crash.
The weakness exists in the ingress flow creation functionality due to incorrect handling of an internal software lock that can prevent other system processes from getting CPU cycles, causing a high CPU condition. A remote attacker can send a steady stream of malicious IP packets that can cause connections to be created, exhaust CPU resources and cause the service to crash.
How to mitigate CVE-2018-0228
Update to versions 201.1(15.1), 201.1(14.4), 201.1(1.82), 101.2(1.20), 100.13(0.171), 100.11(0.87), 100.8(40.140), 99.1(20.127), 98.2(10.4), 98.2(0.5), 97.1(0.167), 96.2(0.151), 9.9(0.152), 9.8(2.12), 9.7(1.16), 9.6(4), 9.6(3.236), 9.6(3.16), 9.4(4.13), 9.2(4.26), 9.1(7.232) or 9.1(7.20).