python-gnupg 0.4.3 Passphrase input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in python-gnupg 0.4.3. This affects an unknown function of the component Passphrase Handler. This manipulation causes input validation. The identification of this vulnerability is CVE-2019-6690. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in python-gnupg 0.4.3 (Programming Language Software). It has been declared as critical. Affected by this vulnerability is some unknown processing of the component Passphrase Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

python-gnupg 0.4.3 allows context-dependent attackers to trick gnupg to decrypt other ciphertext than intended. To perform the attack, the passphrase to gnupg must be controlled by the adversary and the ciphertext should be trusted. Related to a "CWE-20: Improper Input Validation" issue affecting the affect functionality component.

The bug was discovered 01/25/2019. The weakness was shared 03/21/2019 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2019-6690 since 01/23/2019. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 55 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 197447 (Ubuntu Security Notification for Python-gnupg Vulnerabilities (USN-3964-1)).

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 104450†). The entry VDB-119304 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/08/2018 🔍
01/23/2019 +229 days 🔍
01/25/2019 +2 days 🔍
03/21/2019 +55 days 🔍
03/22/2019 +1 days 🔍
08/04/2023 +1596 days 🔍

Sourcesinfo

Advisory: 151341⛔
Status: Confirmed

CVE: CVE-2019-6690 (🔍)
GCVE (CVE): GCVE-0-2019-6690
GCVE (VulDB): GCVE-100-132019
SecurityFocus: 104450 - GnuPG CVE-2018-12020 Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 03/22/2019 08:40
Updated: 08/04/2023 07:49
Changes: 03/22/2019 08:40 (60), 05/18/2020 16:23 (4), 08/04/2023 07:43 (3), 08/04/2023 07:49 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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