De Microsoft Management Console (MMC), gebruikt door systeembeheerders om te configureren en te volgen systeemprestaties, bevat een aantal kwetsbaarheden, met behulp waarvan aanvallers malware of onderscheppen controle op de aangevallen computer implementeren.The vulnerability group, which includes XSS en XXE bugs, received a common identifier CVE-2019-0948. Aanvallers kunnen problemen exploiteren met behulp van de snap-in mechanisme in het MMC. Snap-ins are small programs that allow customizing different aspects of the system.
In order to exploit the vulnerability, an attacker will need to create a file with the .msc uitbreiding, containing specially crafted XML content, and then convince an authorized user (bijvoorbeeld, using social engineering) to import this file.
As the researchers from check Point, who discovered the bugs, explained, an attacker can create a file with the Link to Web Address snap-in (link to a web-resource) and include a link to its own server, thus redirecting to a page with malicious code.
“We have successfully managed to insert malicious URL link that contains malicious payloads such as redirection to SMB server that will capture the user NTLM hash”, - verslag van de onderzoekers.
Op dezelfde manier, an attacker can create a file with the ActiveX Control snap-in and save it as an .msc file by changing the string value in the StringsTables section to a malicious URL controlled by it.
Volgens experts, MMC files are used by system administrators and are not considered antivirus software as malicious. Cybercriminals can take advantage of it to control of a PC with administrator status and further advance over the network.
The problems affect versions of ramen 7, ramen 8.1, ramen 10 en Windows Server 2008 – Windows Server 2019. Microsoft has al vast vulnerabilities with the release of June service pack. Momenteel, there are no cases of bugs’ exploitation.
De Microsoft Management Console (MMC) is a tool for opening, creating, and saving administration tools (called MMC consoles) that manage hardware, software, and network components of the MS Windows operating system.