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
.
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
Successful exploitation heightens the risk of local path traversal attack vectors exactly 1 directory higher than intended.
gh
to 2.63.1
..
, to prevent path traversal risks.{ "nvd_published_at": "2024-12-04T16:15:26Z", "cwe_ids": [ "CWE-22" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2024-12-04T15:32:45Z" }