Cisco ACNS contains buffer overflow vulnerability in the authentication module when supplied an overly long password

Overview

Cisco Application and Content Networking Software (ACNS) contains a buffer overflow that may enable an attacker to execute arbitrary code on the affected device.

Description

Cisco ACNS Software “…combines demand-pull caching and pre-positioning for accelerated delivery of web applications, objects, files, and streaming media; and runs on Cisco Content Engines, Content Distribution Manager, and Content Router hardware platforms.” From <http://www.cisco.com/warp/public/707/cisco-sa-20031210-ACNS-auth.shtml&gt;:

By entering an overly long password, it may be possible to execute arbitrary code on a vulnerable device. This vulnerability affects all devices and hardware modules that are running ACNS software releases prior to 4.2.11 and 5.0.5.

According to the Cisco advisory the hardware models that supports ACNS are:

* Content Routers 4400 series
* Content Distribution Manager 4600 series
* Content Engine 500 and 7300 series
* Content Engine Module for Cisco Routers 2600, 3600 and 3700 series

This issue has been assigned Cisco bug IDs CSCeb25596 and CSCeb27087.

Impact

By supplying an overly long password, it is possible to trigger a buffer overflow in the authentication module. This may enable an attacker to execute arbitrary code on the affected device or cause denial of service.

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Solution

Upgrade
Upgrade ACNS software as referenced in _<http://www.cisco.com/warp/public/707/cisco-sa-20031210-ACNS-auth.shtml&gt;__._ This vulnerability is fixed in 4.2.11 and 5.0.5 releases of ACNS.

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Disable Content Engine GUI

The workaround is to disable the CE GUI server using the following command:

no gui-server enable

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Vendor Information

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Updated: December 18, 2003

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see _<http://www.cisco.com/warp/public/707/cisco-sa-20031210-ACNS-auth.shtml&gt;_

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23352462 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.cisco.com/warp/public/707/cisco-sa-20031210-ACNS-auth.shtml&gt;
• <http://www.secunia.com/advisories/10409/&gt;
• <http://xforce.iss.net/xforce/xfdb/13945&gt;
• <http://www.securityfocus.com/bid/9187&gt;

Acknowledgements

This vulnerability was reported by the Cisco Systems Product Security Incident Response Team.

This document was written by Robert C Seacord.

Other Information

CVE IDs:	CVE-2003-0982
Severity Metric:	12.96 Date Public: