#VU50128 Out-of-bounds write in Vir.IT eXplorer - CVE-2017-16235

Vulnerability identifier: #VU50128

Vulnerability risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-16235

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Vir.IT eXplorer
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: TG Soft

Description
The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary within the 0x82730098 IOCTL in Viragtlt.sys and Viraglt64.sys system drivers. A local user can run a specially crafted program on the system, trigger an out-of-bounds write and execute arbitrary code on the system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vir.IT eXplorer: 8.5.39

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External links
https://www.greyhathacker.net/?p=990

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.