Microsoft NTLM Hash Disclosure Spoofing (library-ms)

vendor:

Windows

by:

John Page (hyp3rlinx)

4.1

CVSS

MEDIUM

Information Disclosure

200

CWE

Product Name: Windows

Affected Version From: Unknown

Affected Version To: Unknown

Patch Exists: NO

Related CWE: CVE-2025-24054

CPE: a:microsoft:windows

Metasploit:

Other Scripts:

Platforms Tested: Windows

2018

Microsoft NTLM Hash Disclosure Spoofing (library-ms)

The Microsoft library-ms file format was found to have an NTLM hash disclosure vulnerability, where sensitive information could be exposed. Initially considered not severe by MSRC in 2018, it was later acknowledged by Microsoft and assigned CVE-2025-24054 in 2025. This vulnerability allows remote attackers to access sensitive information.

Mitigation:

To mitigate this vulnerability, users are advised to avoid opening or interacting with untrusted library-ms files. Regularly updating systems and software can also help prevent exploitation of this issue.

Source

Exploit-DB raw data:

# Exploit title: Microsoft - NTLM Hash Disclosure Spoofing (library-ms)
# Exploit Author: John Page (aka hyp3rlinx)
#  x.com/hyp3rlinx
# ISR: ApparitionSec

Back in 2018, I reported a ".library-ms" File NTLM information disclosure vulnerability to MSRC and was told "it was not severe enough", that being said I post it anyways.
Seven years passed, until other researchers re-reported it.

Subsequently this security flaw was finally deemed important by Microsoft and it received CVE-2025-24054, for which I was finally retroactively credited as the original reporter.

Circa 2025 updated:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24054

[References]
https://web.archive.org/web/20190106181024/https://hyp3rlinx.altervista.org/advisories/MICROSOFT-WINDOWS-.LIBRARY-MS-FILETYPE-INFORMATION-DISCLOSURE.txt
https://packetstorm.news/files/id/148556/
https://cxsecurity.com/issue/WLB-2018070160

[Network Access]
Remote

[Original Disclosure Timeline]
Vendor Notification:  Jun 29, 2018
MSRC Response:   Jul 12, 2018  "risk is not severe enough to justify immediate servicing."
July 14, 2018 : Public Disclosure


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