CVE-2024-54132
Downloading malicious GitHub Actions workflow artifact results in path traversal vulnerability
Impact
### Summary A security vulnerability has been identified in GitHub CLI that could create or overwrite files in unintended directories when users download a malicious GitHub Actions workflow artifact through `gh run download`. ### Details This vulnerability stems from a GitHub Actions workflow artifact named `..` when downloaded using `gh run download`. The artifact name and `--dir` flag are used to determine the artifact’s download path. When the artifact is named `..`, the resulting files within the artifact are extracted exactly 1 directory higher than the specified `--dir` flag value. In `2.63.1`, `gh run download` will not download artifacts named `..` and `.` and instead exit with the following error message: ``` error downloading ..: would result in path traversal ``` ### Impact Successful exploitation heightens the risk of local path traversal attack vectors exactly 1 directory higher than intended. ### Remediation and Mitigation 1. Upgrade `gh` to `2.63.1` 2. Implement additional validation to ensure artifact filenames do not contain potentially dangerous patterns, such as `..`, to prevent path traversal risks.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/cli/cli/v2 | < 2.63.1 | 2.63.1 |
| go | github.com/cli/cli | <= 1.14.0 | none recorded |