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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. The workaround is to disable the CE GUI server.
This advisory will be available at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20031210-ACNS-auth.
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Vulnerable Products
All Cisco products running ACNS software versions prior to 4.2.11 or 5.0.5 are affected. 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
Products Confirmed Not Vulnerable
ACNS version 5.1 is not affected by these vulnerabilities
No other Cisco products are currently known to be affected by these vulnerabilities.
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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.
This vulnerability is assigned Cisco bug IDs CSCeb25596 (registered customers only) and CSCeb27087 (registered customers only).
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The workaround is to disable the CE GUI server using the following command:
no gui-server enable
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This vulnerability is fixed in 4.2.11 and 5.0.5 releases of ACNS.
When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
This vulnerability was discovered during internal testing.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Revision 1.0
2003-Dec-10
Initial public release.
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