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CVE-2020-27352

Canonical Snapd privilege escalation

9.3 CRITICALPublic exploitEPSS 0.26%
  1. Published21 Jun 2024

Description

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Canonical Snapd< 2.48.3
Canonical Ubuntu Linux16.04 · 18.04 · 20.04 · 20.10

Remediation

Fixed in
Canonical Snapd≥ 2.48.3

References

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Frequently asked

Is CVE-2020-27352 being actively exploited?

CVE-2020-27352 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.26%.

How severe is CVE-2020-27352?

CVE-2020-27352 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.26% probability of exploitation.

Which products are affected by CVE-2020-27352?

Affected products include Canonical Snapd, Canonical Ubuntu Linux.

How do I fix CVE-2020-27352?

Upgrade affected software to a fixed version, for example Canonical Snapd 2.48.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-27352 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.