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Custom environment variables allow to alter execution flow of plugins witch lead to potential takeover of the plugin

High
6543 published GHSA-3wf2-2pq4-4rvc Jul 18, 2024

Package

gomod go.woodpecker-ci.org/woodpecker/v2 (Go)

Affected versions

< 2.7.0

Patched versions

2.7.0

Description

Impact

The server allow to create any user who can trigger a pipeline run malicious workflows:

  • Those workflows can either lead to a host takeover that runs the agent executing the workflow.
  • Or allow to extract the secrets who would be normally provided to the plugins who's entrypoint are overwritten.

Patches

#3909
#3934

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?
Enable the "gated" repo feature and review each change upfront of running

References

Credits

  • Daniel Kilimnik @D_K_Dev (Neodyme AG)
  • Felipe Custodio Romero @localo (Neodyme AG)

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE ID

CVE-2024-41122

Weaknesses

No CWEs