Privilege escalation in NTFS in Microsoft Windows



Published: 2018-10-10 | Updated: 2018-11-25
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-8411
CWE-ID CWE-284
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
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 information about 1 vulnerabilities.

Updated on 16.10.2018 - changed vulnerability description, added link to PoC-code, changed CVSS score.

1) Privilege escalation

EUVDB-ID: #VU15271

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-8411

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to the FSCTL_FIND_FILES_BY_SID control code within NTFS filesystem improperly checks for access permissions to list a directory, when Quotas are configured. A local unprivileged user can run a specially crafted application and gain elevated privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10 1809

Windows Server: 2008 - 2019 1803

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8411
http://packetstormsecurity.com/files/download/149824/GS20181016144101.tgz


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.



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