CVE-2024-53859
MEDIUM6.5EPSS 0.08%`auth.TokenForHost` violates GitHub host security boundary when sourcing authentication token within a codespace
Description
### 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: - `GITHUB_TOKEN`, `GH_TOKEN` for GitHub.com and ghe.com - `GITHUB_ENTERPRISE_TOKEN`, `GH_ENTERPRISE_TOKEN` for GitHub Enterprise Server 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](https://github.com/cli/go-gh/blob/71770357e0cb12867d3e3e288854c0aa09d440b7/pkg/auth/auth.go#L73-L77). 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: - [Personal access tokens](https://docs.github.com/en/enterprise-cloud@latest/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens) - [GitHub CLI OAuth app](https://docs.github.com/en/apps/using-github-apps/reviewing-and-revoking-authorization-of-github-apps#reviewing-your-authorized-github-apps) 3. Advise extension users to review their personal [security log](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/reviewing-your-security-log) and any relevant [audit logs](https://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/identifying-audit-log-events-performed-by-an-access-token) for actions associated with their account or enterprise
Affected packages (5)
- Debian/golang-github-cli-go-gh-v2from 0
- Go/github.com/cli/go-ghfrom 0
- Go/github.com/cli/go-ghfrom 0
- Go/github.com/cli/go-gh/v2from 0, < 2.11.1
- Go/github.com/cli/go-gh/v2from 0, < 2.11.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
References (10)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-53859
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-53859
- PATCHhttps://github.com/cli/go-gh
- WEBhttps://docs.github.com/en/apps/using-github-apps/reviewing-and-revoking-authorization-of-github-apps#reviewing-your-authorized-github-apps
- WEBhttps://docs.github.com/en/authentication/keeping-your-account-and-data-secure/reviewing-your-security-log
- WEBhttps://docs.github.com/en/enterprise-cloud@latest/admin/monitoring-activity-in-your-enterprise/reviewing-audit-logs-for-your-enterprise/identifying-audit-log-events-performed-by-an-access-token
- WEBhttps://docs.github.com/en/enterprise-cloud@latest/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens
- WEBhttps://github.com/cli/go-gh/blob/71770357e0cb12867d3e3e288854c0aa09d440b7/pkg/auth/auth.go#L73-L77
- WEBhttps://github.com/cli/go-gh/security/advisories/GHSA-55v3-xh23-96gh
- WEBhttps://pkg.go.dev/vuln/GO-2024-3295