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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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