Categories: intrusive, vuln
Checks if a machine is vulnerable to MS12-020 RDP vulnerability.
The Microsoft bulletin MS12-020 patches two vulnerabilities: CVE-2012-0152 which addresses a denial of service vulnerability inside Terminal Server, and CVE-2012-0002 which fixes a vulnerability in Remote Desktop Protocol. Both are part of Remote Desktop Services.
The script works by checking for the CVE-2012-0152 vulnerability. If this vulnerability is not patched, it is assumed that CVE-2012-0002 is not patched either. This script can do its check without crashing the target.
The way this works follows:
- Send one user request. The server replies with a user id (call it A) and a channel for that user.
- Send another user request. The server replies with another user id (call it B) and another channel.
- Send a channel join request with requesting user set to A and requesting channel set to B. If the server replies with a success message, we conclude that the server is vulnerable.
- In case the server is vulnerable, send a channel join request with the requesting user set to B and requesting channel set to B to prevent the chance of a crash.
Original check by by Worawit Wang (sleepya).
vulns.short, vulns.showallSee the documentation for the vulns library.
nmap -sV --script=rdp-vuln-ms12-020 -p 3389 <target>
PORT STATE SERVICE VERSION 3389/tcp open ms-wbt-server? | rdp-vuln-ms12-020: | VULNERABLE: | MS12-020 Remote Desktop Protocol Denial Of Service Vulnerability | State: VULNERABLE | IDs: CVE:CVE-2012-0152 | Risk factor: Medium CVSSv2: 4.3 (MEDIUM) (AV:N/AC:M/Au:N/C:N/I:N/A:P) | Description: | Remote Desktop Protocol vulnerability that could allow remote attackers to cause a denial of service. | | Disclosure date: 2012-03-13 | References: | http://technet.microsoft.com/en-us/security/bulletin/ms12-020 | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0152 | | MS12-020 Remote Desktop Protocol Remote Code Execution Vulnerability | State: VULNERABLE | IDs: CVE:CVE-2012-0002 | Risk factor: High CVSSv2: 9.3 (HIGH) (AV:N/AC:M/Au:N/C:C/I:C/A:C) | Description: | Remote Desktop Protocol vulnerability that could allow remote attackers to execute arbitrary code on the targeted system. | | Disclosure date: 2012-03-13 | References: | http://technet.microsoft.com/en-us/security/bulletin/ms12-020 |_ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0002
License: Same as Nmap--See https://nmap.org/book/man-legal.html