Vulnerability identifier: #VU11353
Vulnerability risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-19
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco IOS XE
Operating systems & Components /
Operating system
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote unauthenticated attacker to cause high CPU utilization, traceback messages, or cause DoS condition on the target system.
The weakness exists in the IP Version 4 (IPv4) processing code due to incorrect processing of certain IPv4 packets. A remote attacker can send specially crafted IPv4 packets to an IPv4 address, trigger high CPU utilization, traceback messages, or cause the service to crash.
Mitigation
Update to versions 16.5.2, 16.5.1a, 16.3.4, 16.6(0.163), 16.5(1.25) or 16.3(3.26).
Vulnerable software versions
Cisco IOS XE: 16.3.1 - 16.3.3
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-ipv4
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.