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AUSCERT External Security Bulletin Redistribution
ESB-2018.1221
Cisco AMP for Endpoints macOS Connector DMG File Malware
Bypass Vulnerability
19 April 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco AMP for Endpoints macOS Connector
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0237
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-amp
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Cisco AMP for Endpoints macOS Connector DMG File Malware Bypass Vulnerability
Medium
Advisory ID: cisco-sa-20180418-amp
First Published: 2018 April 18 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCve34034
CVE-2018-0237
CWE-20
CVSS Score: 5.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the file type detection mechanism of the Cisco Advanced
Malware Protection (AMP) for Endpoints macOS Connector could allow an
unauthenticated, remote attacker to bypass malware detection.
The vulnerability occurs because the software relies on only the file
extension for detecting DMG files. An attacker could exploit this
vulnerability by sending a DMG file with a nonstandard extension to a
device that is running an affected AMP for Endpoints macOS Connector. An
exploit could allow the attacker to bypass configured malware detection.
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-20180418-amp
Affected Products
o Vulnerable Products
This vulnerability affects the macOS Connector of Cisco Advanced Malware
Protection (AMP) for Endpoints. 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.
The following Cisco products are confirmed as not vulnerable:
- AnyConnect Secure Mobility Client for iOS
- AnyConnect Secure Mobility Client for Mac OS X
- AMP for Endpoints Windows Connector
- AMP for Endpoints Linux Connector
- AMP for Endpoints iOS Connector
- AMP for Endpoints Android Connector
- Content Security Management Appliance
- Email Security Appliance
- Web Security Appliance
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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
o The Cisco Product Security Incident Response Team (PSIRT) is aware of a
public announcement of this vulnerability. However, there have been no
reports of malicious use of the vulnerability that is described in this
advisory.
Source
o Cisco would like to thank Yakov Shafranovich of Nightwatch Cybersecurity
Research for reporting this vulnerability.
Cisco Security Vulnerability Policy
o 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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180418-amp
Revision History
o
+----------+----------------------------+----------+---------+----------------+
| Version | Description | Section | Status | Date |
+----------+----------------------------+----------+---------+----------------+
| 1.0 | Initial public release. | -- | Final | 2018-April-18 |
+----------+----------------------------+----------+---------+----------------+
- -------------------------------------------------------------------------------
Legal Disclaimer
o 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.
Cisco Security Vulnerability Policy
o 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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