Vulnerability identifier: #VU12082

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0230

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco ASA 5500-X Series
Hardware solutions / Security hardware applicances

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the internal packet-processing functionality due to improper validation of IP Version 4 (IPv4) and IP Version 6 (IPv6) packets after the software reassembles the packets. A remote attacker can send a series of malicious, fragmented IPv4 or IPv6 packets, trigger Snort processes to hang at 100% CPU utilization, which can cause the device to stop processing traffic, and cause the service to crash.

Mitigation
Update to versions 201.1(15.2), 201.1(15.1), 201.1(1.110), 201.1(1.96), 101.2(1.53), 99.1(20.134), 99.1(20.127), 99.1(0.2), 98.2(10.4), 98.2(0.9), 9.9(1.77), 9.9(0.152) or 9.8(2.10).

Vulnerable software versions

Cisco ASA 5500-X Series: 9.8.2

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-fp2100

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.