'[FD] ESA-2017-115: EMC AppSync Host Plug-in Denial of Service Vulnerability'

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List:       full-disclosure
Subject:    [FD] ESA-2017-115: EMC AppSync Host Plug-in Denial of Service Vulnerability
From:       EMC Product Security Response Center <Security_Alert () emc ! com>
Date:       2017-09-26 18:51:39
Message-ID: 1BF8853173D9704A93EF882F85952A892F9105 () MX304CL04 ! corp ! emc ! com
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ESA-2017-115: EMC AppSync Host Plug-in Denial of Service Vulnerability

EMC Identifier: ESA-2017-115
CVE Identifier: CVE-2017-8018
Severity Rating: CVSS v3 Base Score: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected products:  
EMC AppSync host plug-in versions 3.5 and below (Windows platform only)

Summary:  
EMC AppSync host plug-in on Windows platform includes a denial of service (DoS) vulnerability \
that could potentially be exploited by malicious users to compromise the affected system.

Details:
EMC AppSync Host Plug-in (AppSync agent) on Windows platforms may be vulnerable when processing \
a large amount of network packets. An unauthenticated remote attacker can send specifically \
crafted packets to the vulnerable service (port 10004) and cause denial of service situation. 

Resolution:  
*	Upgrade to EMC AppSync Host Plug-in version 3.1 followed by deploying Host Plug-in patch \
                version 3.1.0.3 on top of 3.1
*	Upgrade to EMC AppSync Host Plug-in version 3.5 followed by deploying with AppSync security \
update for Windows Host Plug-in Denial of Service Vulnerability Hot Fix at location on top of \
3.5 EMC recommends all customers upgrade at the earliest opportunity. 

Customers are advised to follow security best practices and block all traffic to AppSync agents \
by default and explicitly allow only specific traffic from known AppSync servers. This strategy \
provides good control over the traffic and helps minimize the attack surface. See EMC AppSync \
Security Configuration Guide for more information. 

Link to remedies:

Customers can download software from https://support.emc.com/downloads/25364_AppSync 

Credits:
EMC would like to thank Fortinet's FortiGuard Labs for reporting this vulnerability.