ESB-2017.2948 - [Win] Cisco Immunet Antimalware Installer: Administrator compromise - Existing account 2017-11-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2948
     Cisco Immunet Antimalware Installer DLL Preloading Vulnerability
                             17 November 2017

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        AusCERT Security Bulletin Summary
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Product:           Cisco Immunet Antimalware Installer
Publisher:         Cisco Systems
Operating System:  Windows
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12312  

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

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Cisco Immunet Antimalware Installer DLL Preloading Vulnerability

Severity: Medium
Advisory ID: cisco-sa-20171115-iami
First Published: 2017 November 15 16:00  GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvf23928
CVE-2017-12312
CWE-20

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

CVE-2017-12312
CWE-20

Summary

  * An untrusted search path vulnerability in the Cisco Immunet antimalware
    installer 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-iami

Affected Products

  * Vulnerable Products

    This vulnerability affects Cisco Immunet Antimalware Installer. For
    information about affected software releases, consult the Cisco bug ID(s)
    at the top of this advisory.

    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

  * For information about fixed software releases, consult the Cisco bug ID(s)
    at the top of this advisory.

    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.

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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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