Cisco IOS DHCP Client DoS (cisco-sa-20170322-dhcpc)

high Nessus Plugin ID 99026
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, the Cisco IOS software running on the remote device is affected by a denial of service vulnerability in the DHCP client implementation when parsing DHCP packets. An unauthenticated, remote attacker can exploit this issue, via specially crafted DHCP packets, to cause the device to reload.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCuu43892.

See Also

http://www.nessus.org/u?0d54a2ce

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuu43892

Plugin Details

Severity: High

ID: 99026

File Name: cisco-sa-20170322-dhcpc-ios.nasl

Version: 1.10

Type: combined

Family: CISCO

Published: 3/28/2017

Updated: 11/13/2019

Dependencies: cisco_ios_version.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/22/2017

Vulnerability Publication Date: 3/22/2017

Reference Information

CVE: CVE-2017-3864

BID: 97012

CISCO-BUG-ID: CSCuu43892

CISCO-SA: cisco-sa-20170322-dhcpc