Cisco IOS HTTP Server Vulnerability - Cisco Systems

high Nessus Plugin ID 48949

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Synopsis

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

Description

A defect in multiple releases of Cisco IOS software will cause a Cisco router or switch to halt and reload if the IOS HTTP service is enabled and browsing to "http://<router-ip>/%%" is attempted. This defect can be exploited to produce a denial of service (DoS) attack. This defect has been discussed on public mailing lists and should be considered public information. The vulnerability, identified as Cisco bug ID CSCdr36952, affects virtually all mainstream Cisco routers and switches running Cisco IOS software releases 11.1 through 12.1, inclusive. The vulnerability has been corrected and Cisco is making fixed releases available to replace all affected IOS releases. Customers are urged to upgrade to releases that are not vulnerable to this defect as shown in detail below. The vulnerability can be mitigated by disabling the IOS HTTP server, using an access-list on an interface in the path to the router to prevent unauthorized network connections to the HTTP server, or applying an access-class option directly to the HTTP server itself. The IOS HTTP server is enabled by default only on Cisco 1003, 1004, and 1005 routers that are not configured. In all other cases, the IOS http server must be explicitly enabled in order to exploit this defect.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20000514-ios-http-server.

See Also

https://seclists.org/bugtraq/2000/Apr/250

http://www.nessus.org/u?3bcafed3

http://www.nessus.org/u?eafcf2a7

Plugin Details

Severity: High

ID: 48949

File Name: cisco-sa-20000514-ios-http-serverhttp.nasl

Version: 1.17

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

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

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/14/2000

Vulnerability Publication Date: 4/27/2000

Reference Information

CVE: CVE-2000-0380

BID: 1154

CWE: 20

CERT: 24346

CISCO-SA: cisco-sa-20000514-ios-http-server

CISCO-BUG-ID: CSCdr36952