Buffer overflow in Microsoft Windows RDP for Windows XP/2003



Published: 2017-05-12 | Updated: 2017-06-29
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-0176
CWE-ID CWE-119
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU10261

Risk: Critical

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2017-0176

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in the Smart Card authentication code in gpkcsp.dll within Windows Remote Desktop services. A remote attacker can send specially crafted packets to the vulnerable system, trigger buffer overflow and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to gain complete control over the affected system.

Note: this vulnerability was publicly disclosed by the Shadow Brokers hacking team along with a fully functional exploit known as "“EsteemAudit".

The vulnerability is being exploited in the wild.


Mitigation

Install a security patch:
https://support.microsoft.com/en-us/help/4022747/security-update-for-windows-xp-and-windows-server-2...

Vulnerable software versions

Windows: XP

Windows Server: 2003

External links

http://support.microsoft.com/en-us/help/4022747/security-update-for-windows-xp-and-windows-server-2...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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