Microsoft Compiled HTML Help hh.exe privilege escalation

A vulnerability, which was classified as critical, was found in Microsoft Compiled HTML Help (the affected version unknown). This affects an unknown functionality of the file hh.exe. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-269. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 07/16/2019 by John Page (hyp3rlinx) as unconfirmed advisory (Website). The advisory is shared at hyp3rlinx.altervista.org. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The exploit is shared for download at hyp3rlinx.altervista.org. The vulnerability was handled as a non-public zero-day exploit for at least 82 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Vendor

• Microsoft

Name

• Compiled HTML Help

• 🔒

• 🔒

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.3
VulDB Temp Score: 5.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Privilege escalation (CWE-269)
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒
Exploit Delay Time: 🔍

04/25/2019 Vendor informed
07/16/2019 +82 days Advisory disclosed
07/16/2019 +0 days Exploit disclosed
07/22/2019 +6 days VulDB entry created
07/22/2019 +0 days VulDB last updateVendor: microsoft.com

Advisory: hyp3rlinx.altervista.org
Researcher: John Page (hyp3rlinx)
Status: Unconfirmed

Created: 07/22/2019 01:37 PM
Complete: 🔍
Submitter: hyp3rlinx

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