What is the CVSS score of CVE-2020-26261?

CVE-2020-26261 has a CVSS 3.1 base score of 7.9 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.5%.

Is there a patch available for CVE-2020-26261?

Yes, a patch is available for CVE-2020-26261. Update the affected software to the latest version immediately.

Jupyterhub CVE-2020-26261

HIGH

Exposure of Resource to Wrong Sphere (CWE-668)

2020-12-09 security-advisories@github.com

Information Disclosure Jupyterhub Systemdspawner

7.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.9 HIGH

AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Dec 09, 2020 - 17:15 nvd

HIGH 7.9

DescriptionNVD

jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemdspawner before version 0.15 user API tokens issued to single-user servers are specified in the environment of systemd units. These tokens are incorrectly accessible to all users. In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default. This is patched in jupyterhub-systemdspawner v0.15

AnalysisAI

jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. Rated high severity (CVSS 7.9), this vulnerability is low attack complexity. This Exposure of Resource to Wrong Sphere vulnerability could allow attackers to access resources from an unintended security context.

Technical ContextAI

This vulnerability is classified as Exposure of Resource to Wrong Sphere (CWE-668), which allows attackers to access resources from an unintended security context. jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemdspawner before version 0.15 user API tokens issued to single-user servers are specified in the environment of systemd units. These tokens are incorrectly accessible to all users. In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default. This is patched in jupyterhub-systemdspawner v0.15 Affected products include: Jupyterhub Systemdspawner. Version information: version 0.15.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement proper access controls, validate resource access permissions, use security boundaries.