Denial of service in Cisco IOS

1) Improper input validation

EUVDB-ID: #VU15419

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0441

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an adjacent unauthenticated attacker to cause DoS condition on the target system.

The vulnerability exists in the 802.11r Fast Transition feature set due to a corruption of certain timer mechanisms triggered by specific roaming events. An adjacent attacker can send malicious reassociation events multiple times to the same AP in a short period of time and cause a DoS condition on the affected AP.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco IOS: 15.3.3 JA12

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-ap-ft-dos

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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