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Cable Modem Termination System Authentication Bypass - Cisco Systems

medium Nessus Plugin ID 48966

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

Two issues are described in this security advisory. The first issue involves cable modems not manufactured by Cisco that allow a configuration file to be downloaded from an interface that is not connected to the network of the cable modem's service provider.
This historical behavior allows an unauthorized configuration to be downloaded to the cable modem. Cisco is providing a feature in its own software that mitigates this vulnerability. This feature is documented as CSCdx57688. The second issue concerns a vulnerability in Cisco IOS Software on only the Cisco uBR7200 series and uBR7100 series Universal Broadband Routers. A defect, documented as CSCdx72740, allows the creation of a truncated, invalid configuration file that is improperly accepted as valid by the affected routers. Both of these vulnerabilities have been exploited to steal service by reconfiguring the cable modem to remove bandwidth restrictions.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20020617-cmts-md5-bypass.

See Also

http://www.nessus.org/u?ca4de3ec

http://www.nessus.org/u?1a1e2785

Plugin Details

Severity: Medium

ID: 48966

File Name: cisco-sa-20020617-cmts-md5-bypasshttp.nasl

Version: 1.13

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2002

Vulnerability Publication Date: 6/17/2002

Reference Information

CVE: CVE-2002-1706

BID: 5041