Canonical snapd up to 2.48.2 privilege context switching

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Canonical snapd up to 2.48.2 and classified as critical. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to privilege context switching. The identification of this vulnerability is CVE-2020-27352. The attack can only be executed locally. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Canonical snapd up to 2.48.2. This vulnerability affects an unknown code. The manipulation with an unknown input leads to a privilege context switching vulnerability. The CWE definition for the vulnerability is CWE-270. The product does not properly manage privileges while it is switching between different contexts that have different privileges or spheres of control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.

The weakness was shared by Gilad Reti as USN-4728-1. The advisory is available at bugs.launchpad.net. This vulnerability was named CVE-2020-27352 since 10/20/2020. The exploitation appears to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 2.48.3 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 9.3
CNA Vector (Canonical Ltd.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Privilege context switching
CWE: CWE-270 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: snapd 2.48.3

Timelineinfo

10/20/2020 🔍
06/21/2024 +1340 days 🔍
06/21/2024 +0 days 🔍
08/27/2025 +431 days 🔍

Sourcesinfo

Advisory: USN-4728-1
Researcher: Gilad Reti
Status: Confirmed

CVE: CVE-2020-27352 (🔍)
GCVE (CVE): GCVE-0-2020-27352
GCVE (VulDB): GCVE-100-269434

Entryinfo

Created: 06/21/2024 22:36
Updated: 08/27/2025 01:59
Changes: 06/21/2024 22:36 (65), 06/24/2024 15:29 (1), 08/27/2025 01:59 (11)
Complete: 🔍
Cache ID: 216::103

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