Vulnerability Note VU#101048
<h2>Microsoft .NET framework WSDL parser PrintClientProxy remote code execution vulnerability</h2> <p class="meta-text">Original Release date: 13 Sep 2017 | Last revised: 13 Sep 2017</p><!-- END SOCIAL BUTTONS -->
OverviewThe Microsoft .NET framework fails to properly parse WSDL content, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
The PrintClientProxy method in the WSDL-parsing component of the Microsoft .NET framework fails to properly handle linefeed characters. If an attacker can trigger the .NET framework to trigger a specially-crafted WSDL file, this can result in arbitrary code execution.
This vulnerability is currently being exploited in the wild, by way of an RTF file with an embedded object that triggers a remote WSDL file to be retrieved and parsed. Other attack vectors may be possible.
By causing the .NET framework to parse a specially-crafted WSDL file, an unauthenticated remote attacker may be able to execute arbitrary code on a vulnerable system. Current exploits achieve this by convincing a user to open a RTF document.
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This issue is addressed in CVE-2017-8759 | .NET Framework Remote Code Execution Vulnerability
Vendor Information (Learn More)
Vendor Status Date Notified Date Updated Microsoft Corporation Affected – 13 Sep 2017
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CVSS Metrics (Learn More)
Group Score Vector Base 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P Temporal 6.5 E:H/RL:OF/RC:C Environmental 6.5 CDP:ND/TD:H/CR:ND/IR:ND/AR:ND https://www.fireeye.com/blog/threat-research/2017/09/zero-day-used-to-distribute-finspy.html https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8759
This issue was discovered by Genwei Jiang and Dhanesh Kizhakkinan of FireEye, Inc.
- CVE IDs:
Date Public: 12 Sep 2017 Date First Published: 13 Sep 2017 Date Last Updated: 13 Sep 2017 Document Revision: 12
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