ESB-2017.2918 - [Win] Cisco Network Academy Packet Tracer (CTP): Administrator compromise - Existing account 2017-11-16

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2918
       Cisco Network Academy Packet Tracer DLL Preload Vulnerability
                             16 November 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Network Academy Packet Tracer (CTP)
Publisher:         Cisco Systems
Operating System:  Windows
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12313  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-cpt

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Cisco Network Academy Packet Tracer DLL Preload Vulnerability

Severity: Medium

Advisory ID: cisco-sa-20171115-cpt
First Published: 2017 November 15 16:00  GMT
Version 1.0: Final
Workarounds: No workarounds available

CVE-2017-12313
CWE-427

CVSS Score: Base 4.2
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X

Summary

  * An untrusted search path vulnerability in the Cisco Network Academy Packet
    Tracer software could allow an authenticated, local attacker to execute
    arbitrary code via DLL hijacking if a local user with administrative
    privileges executes the installer in the current working directory where a
    crafted DLL has been placed by an attacker.

    The vulnerability is due to incomplete input validation of path and file
    names of a DLL file before it is loaded. An attacker could exploit this
    vulnerability by creating a malicious DLL file and installing it in a
    specific system directory. A successful exploit could allow the attacker to
    execute commands on the underlying Microsoft Windows host with privileges
    equivalent to the SYSTEM account. An attacker would need valid user
    credentials to exploit this vulnerability.

    There are no workarounds that address this vulnerability.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-20171115-cpt

Affected Products

  * Vulnerable Products

    This vulnerability affects Cisco Network Academy Packet Tracer software.

    Products Confirmed Not Vulnerable

    No other Cisco products are currently known to be affected by this
    vulnerability.

Workarounds

  * There are no workarounds that address this vulnerability.

Fixed Software

  * When considering software upgrades, customers are advised to regularly
    consult the advisories for Cisco products, which are available from the
    Cisco Security Advisories and Alerts page, to determine exposure and a
    complete upgrade solution.

    In all cases, customers should ensure that the devices to be upgraded
    contain sufficient memory and confirm that current hardware and software
    configurations will continue to be supported properly by the new release.
    If the information is not clear, customers are advised to contact the Cisco
    Technical Assistance Center (TAC) or their contracted maintenance
    providers.

Exploitation and Public Announcements

  * The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any public announcements or malicious use of the vulnerability that is
    described in this advisory.

Source

  * This vulnerability was reported to Cisco by Kushal Arvind Shah of
    Fortinet's FortiGuard Labs.

Cisco Security Vulnerability Policy

  * 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.

Legal Disclaimer

  * THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
    OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
    FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
    OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
    THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

    A standalone copy or paraphrase of the text of this document that omits the
    distribution URL is an uncontrolled copy and may lack important information
    or contain factual errors. The information in this document is intended for
    end users of Cisco products.

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