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Security Advisories: GSA_kwCzR0hTQS01NXYzLXhoMjMtOTZnaM4ABB4b

`auth.TokenForHost` violates GitHub host security boundary when sourcing authentication token within a codespace

Summary

A security vulnerability has been identified in go-gh that could leak authentication tokens intended for GitHub hosts to non-GitHub hosts when within a codespace.

Details

go-gh sources authentication tokens from different environment variables depending on the host involved:

Prior to 2.11.1, auth.TokenForHost could source a token from the GITHUB_TOKEN environment variable for a host other than GitHub.com or ghe.com when within a codespace.

In 2.11.1, auth.TokenForHost will only source a token from the GITHUB_TOKEN environment variable for GitHub.com or ghe.com hosts.

Impact

Successful exploitation could send authentication token to an unintended host.

Remediation and mitigation

  1. Upgrade go-gh to 2.11.1
  2. Advise extension users to regenerate authentication tokens:
  3. Advise extension users to review their personal security log and any relevant audit logs for actions associated with their account or enterprise
Permalink: https://github.com/advisories/GHSA-55v3-xh23-96gh
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01NXYzLXhoMjMtOTZnaM4ABB4b
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 13 days ago
Updated: 8 days ago


CVSS Score: 6.5
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

EPSS Percentage: 0.00044
EPSS Percentile: 0.11764

Identifiers: GHSA-55v3-xh23-96gh, CVE-2024-53859
References: Repository: https://github.com/cli/go-gh
Blast Radius: 9.8

Affected Packages

go:github.com/cli/go-gh/v2
Dependent packages: 346
Dependent repositories: 32
Downloads:
Affected Version Ranges: <= 2.11.0
Fixed in: 2.11.1
All affected versions: 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.3.0, 2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.0, 2.9.0, 2.10.0, 2.11.0
All unaffected versions: