VDB-115674 · CVE-2018-9234 · Nessus 109095

GnuPG 2.2.4/2.2.5 Key Certification key management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	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 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.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in GnuPG 2.2.4/2.2.5. It has been declared as critical. This impacts an unknown function of the component Key Certification. The manipulation results in key management. This vulnerability is cataloged as CVE-2018-9234. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in GnuPG 2.2.4/2.2.5. It has been classified as critical. Affected is some unknown processing of the component Key Certification. The manipulation with an unknown input leads to a key management vulnerability. CWE is classifying the issue as CWE-320. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

GnuPG 2.2.4 and 2.2.5 does not enforce a configuration in which key certification requires an offline master Certify key, which results in apparently valid certifications that occurred only with access to a signing subkey.

The bug was discovered 03/29/2018. The weakness was shared 04/04/2018 (Website). The advisory is available at dev.gnupg.org. This vulnerability is traded as CVE-2018-9234 since 04/03/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

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 vulnerability scanner Nessus provides a plugin with the ID 109095 (Fedora 26 : gnupg2 (2018-42a426b17e)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197163 (Ubuntu Security Notification for Gnupg, Gnupg2 Vulnerabilities (USN-3675-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109095). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

GnuPG

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Key management
CWE: CWE-320
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 109095
Nessus Name: Fedora 26 : gnupg2 (2018-42a426b17e)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 54538
OpenVAS Name: Fedora Update for gnupg2 FEDORA-2018-42a426b17e
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

03/29/2018 🔍
04/03/2018 +5 days 🔍
04/03/2018 +0 days 🔍
04/04/2018 +1 days 🔍
04/04/2018 +0 days 🔍
04/18/2018 +14 days 🔍
04/18/2018 +0 days 🔍
02/26/2023 +1775 days 🔍