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Cisco IOS DHCP Blocked Interface Denial-of-Service - Cisco Systems

medium Nessus Plugin ID 48978

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

Cisco IOS devices running branches of Cisco IOS version 12.2S that have Dynamic Host Configuration Protocol (DHCP) server or relay agent enabled, even if not configured, are vulnerable to a denial of service where the input queue becomes blocked when receiving specifically crafted DHCP packets. Cisco is providing free fixed software to address this issue. There are also workarounds to mitigate this vulnerability.
This issue was introduced by the fix included in CSCdx46180 and is being tracked by Cisco Bug ID CSCee50294.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20041110-dhcp.

See Also

http://www.nessus.org/u?1c793e4c

http://www.nessus.org/u?e24ccf46

Plugin Details

Severity: Medium

ID: 48978

File Name: cisco-sa-20041110-dhcphttp.nasl

Version: 1.14

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Patch Publication Date: 11/10/2004

Vulnerability Publication Date: 11/10/2004

Reference Information

CVE: CVE-2004-1111

CERT: 630104

CISCO-SA: cisco-sa-20041110-dhcp

CISCO-BUG-ID: CSCdx46180, CSCee50294