QtPass up to 1.2.0 Password Generator weak prng

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in QtPass up to 1.2.0 and classified as critical. This issue affects some unknown functionality of the component Password Generator. The manipulation with an unknown input leads to a weak prng vulnerability (Password). Using CWE to declare the problem leads to CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

It was discovered that QtPass before 1.2.1, when using the built-in password generator, generates possibly predictable and enumerable passwords. This only applies to the QtPass GUI.

The bug was discovered 12/23/2017. The weakness was disclosed 01/05/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2017-18021 since 01/05/2018. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.2.1 eliminates this vulnerability.

The entries VDB-134519, VDB-147780, VDB-208986 and VDB-212837 are pretty similar.




CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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Name: Password
Class: Weak prng / Password
CWE: CWE-338 / CWE-331 / CWE-330

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: QtPass 1.2.1


12/23/2017 🔍
01/05/2018 +13 days 🔍
01/05/2018 +0 days 🔍
01/05/2018 +0 days 🔍
01/06/2018 +1 days 🔍
01/20/2023 +1840 days 🔍


Advisory: 338
Status: Not defined

CVE: CVE-2017-18021 (🔍)
See also: 🔍


Created: 01/06/2018 05:14 PM
Updated: 01/20/2023 09:37 AM
Changes: 01/06/2018 05:14 PM (59), 12/19/2019 08:35 PM (1), 01/20/2023 09:37 AM (5)
Complete: 🔍
Cache ID: 44:082:40


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