CVE Vulnerabilities

CVE-2018-0441

Uncontrolled Resource Consumption

Published: Oct 17, 2018 | Modified: Nov 21, 2024
CVSS 3.x
7.4
HIGH
Source:
NVD
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 2.x
6.1 MEDIUM
AV:A/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
RedHat/V3
Ubuntu

A vulnerability in the 802.11r Fast Transition feature set of Cisco IOS Access Points (APs) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a corruption of certain timer mechanisms triggered by specific roaming events. This corruption will eventually cause a timer crash. An attacker could exploit this vulnerability by sending malicious reassociation events multiple times to the same AP in a short period of time, causing a DoS condition on the affected AP.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Name Vendor Start Version End Version
Access_points Cisco 8.0(140.0) (including) 8.0(140.0) (including)
Access_points Cisco 8.2(141.0) (including) 8.2(141.0) (including)
Access_points Cisco 8.2(151.0) (including) 8.2(151.0) (including)
Access_points Cisco 8.3(102.0) (including) 8.3(102.0) (including)
Access_points Cisco 8.3(112.0) (including) 8.3(112.0) (including)
Access_points Cisco 8.3(114.74) (including) 8.3(114.74) (including)
Access_points Cisco 15.3(3)jd (including) 15.3(3)jd (including)

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References