glib up to 2.63.5 pkexec information disclosure

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 (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in glib up to 2.63.5. It has been classified as problematic. Affected by this issue is the function pkexec. The manipulation leads to information disclosure. This vulnerability is referenced as CVE-2021-3800. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in glib up to 2.63.5. This issue affects the function pkexec. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

A flaw was found in glib before version 2.63.6. Due to random charset alias, pkexec can leak content from files owned by privileged users to unprivileged ones under the right condition.

The weakness was published 08/24/2022. The advisory is shared at gitlab.gnome.org. The identification of this vulnerability is CVE-2021-3800 since 09/14/2021. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 291754 (MiracleLinux 8 : glib2-2.56.4-156.el8 (AXSA:2021-2834:05)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.63.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at gitlab.gnome.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (291754). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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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Nessus ID: 291754
Nessus Name: MiracleLinux 8 : glib2-2.56.4-156.el8 (AXSA:2021-2834:05)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: glib 2.63.6
Patch: gitlab.gnome.org

Timelineinfo

09/14/2021 🔍
08/24/2022 +344 days 🔍
08/24/2022 +0 days 🔍
01/20/2026 +1245 days 🔍

Sourcesinfo

Advisory: DLA 3110-1
Status: Confirmed

CVE: CVE-2021-3800 (🔍)
GCVE (CVE): GCVE-0-2021-3800
GCVE (VulDB): GCVE-100-207065

Entryinfo

Created: 08/24/2022 09:14
Updated: 01/20/2026 12:04
Changes: 08/24/2022 09:14 (40), 09/25/2022 09:30 (12), 01/20/2026 12:04 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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