VDB-132087 · CVE-2019-9896 · BID 107523

PuTTY up to 0.70 on Windows Help File input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
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A vulnerability, which was classified as critical, was found in PuTTY up to 0.70 on Windows (Connectivity Software). This affects an unknown code of the component Help File Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-20. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 03/16/2019. The weakness was disclosed 03/21/2019 (Website). It is possible to read the advisory at lists.opensuse.org. This vulnerability is uniquely identified as CVE-2019-9896 since 03/20/2019. Attacking locally is a requirement. A authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371709 (Putty Multiple Security Vulnerabilities).

Upgrading to version 0.71 eliminates this vulnerability.

The entries 132085, 132086, 132088 and 132089 are pretty similar.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Privilege escalation
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍


Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PuTTY 0.71


03/16/2019 🔍
03/16/2019 +0 days 🔍
03/20/2019 +4 days 🔍
03/21/2019 +1 days 🔍
03/22/2019 +1 days 🔍
05/19/2020 +424 days 🔍


Advisory: lists.opensuse.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-9896 (🔍)
SecurityFocus: 107523 - PuTTY CVE-2019-9898 Security Weakness

See also: 🔍


Created: 03/22/2019 12:10 PM
Updated: 05/19/2020 09:35 AM
Changes: (5) vulnerability_discoverydate advisory_url advisory_confirm_url source_securityfocus_date source_securityfocus_class
Complete: 🔍


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