VDB-130838 · CVE-2018-20781 · USN-3894-1

GNOME Keyring up to 3.27.1 pam/gkr-pam-module.c credentials 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.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in GNOME Keyring up to 3.27.1. This issue affects some unknown processing of the file pam/gkr-pam-module.c. Such manipulation leads to credentials management. This vulnerability is listed as CVE-2018-20781. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in GNOME Keyring up to 3.27.1 and classified as problematic. Affected by this issue is an unknown functionality of the file pam/gkr-pam-module.c. The manipulation with an unknown input leads to a credentials management vulnerability. Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality. CVE summarizes:

In pam/gkr-pam-module.c in GNOME Keyring before 3.27.2, the user's password is kept in a session-child process spawned from the LightDM daemon. This can expose the credential in cleartext.

The bug was discovered 04/27/2017. The weakness was presented 02/12/2019 (Website). The advisory is available at usn.ubuntu.com. This vulnerability is handled as CVE-2018-20781 since 02/12/2019. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1552 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 656 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 197378 (Ubuntu Security Notification for Gnome-keyring Vulnerability (USN-3894-1)).

Upgrading to version 3.27.2 eliminates this vulnerability.

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Productinfo

Vendor

GNOME

Name

Keyring

Version

License

open-source

Website

Vendor: https://www.gnome.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Credentials management
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Keyring 3.27.2

Timelineinfo

04/27/2017 🔍
02/12/2019 +656 days 🔍
02/12/2019 +0 days 🔍
02/13/2019 +1 days 🔍
07/10/2023 +1608 days 🔍

Sourcesinfo

Vendor: gnome.org

Advisory: USN-3894-1
Status: Not defined

CVE: CVE-2018-20781 (🔍)
GCVE (CVE): GCVE-0-2018-20781
GCVE (VulDB): GCVE-100-130838

Entryinfo

Created: 02/13/2019 14:04
Updated: 07/10/2023 09:15
Changes: 02/13/2019 14:04 (58), 05/10/2020 10:46 (2), 07/10/2023 09:15 (4)
Complete: 🔍
Cache ID: 216::103