[NEWS] Vulnerability in Authentication Library for ACNS

From: SecuriTeam (support_at_securiteam.com)
Date: 12/11/03

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Date: 11 Dec 2003 13:51:34 +0200

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      Vulnerability in Authentication Library for ACNS
    ------------------------------------------------------------------------

    SUMMARY

    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.

    DETAILS

    Affected 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

    ACNS version 5.1 is not affected.

    Details:
    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.

    Impact:
    The impact of the exploitation of this vulnerability can range from a
    Denial-of-Service to complete control of the device.

    Software Versions and Fixes:
    This vulnerability is fixed in 4.2.11 and 5.0.5 releases of ACNS.

    Workarounds:
    The workaround is to disable the CE GUI server using the following
    command:
    no gui-server enable

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:psirt@cisco.com> Cisco
    Systems Product Security Incident Response Team.

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