snapd prior 2.54.3+18.04/2.54.3+20.04/2.54.3+21.10.1 ~/snap default permission

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in snapd. Affected is an unknown function of the file ~/snap. Executing a manipulation can lead to default permission. The identification of this vulnerability is CVE-2021-3155. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in snapd and classified as critical. This vulnerability affects an unknown code block of the file ~/snap. The manipulation with an unknown input leads to a default permission vulnerability. The CWE definition for the vulnerability is CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. As an impact it is known to affect confidentiality.

The weakness was shared 02/18/2022 as USN-5292-1. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-3155 since 01/15/2021. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1222.

The vulnerability scanner Nessus provides a plugin with the ID 223936 (Linux Distros Unpatched Vulnerability : CVE-2021-3155), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.54.3+18.04, 2.54.3+20.04 or 2.54.3+21.10.1 eliminates this vulnerability. Applying the patch 6bcaeeccd16ed8298a301dd92f6907f88c24cc85 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (223936). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.8
CNA Vector (Canonical Ltd.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 223936
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-3155

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: snapd 2.54.3+18.04/2.54.3+20.04/2.54.3+21.10.1
Patch: 6bcaeeccd16ed8298a301dd92f6907f88c24cc85

Timelineinfo

01/15/2021 🔍
02/18/2022 +399 days 🔍
02/18/2022 +0 days 🔍
03/05/2025 +1111 days 🔍

Sourcesinfo

Advisory: USN-5292-1
Status: Confirmed

CVE: CVE-2021-3155 (🔍)
GCVE (CVE): GCVE-0-2021-3155
GCVE (VulDB): GCVE-100-193324

Entryinfo

Created: 02/18/2022 09:12
Updated: 03/05/2025 11:00
Changes: 02/18/2022 09:12 (50), 02/19/2022 14:52 (1), 03/05/2025 11:00 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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