vulnerability / NVI-00017608 / Revision 1
skillctl: argument injection, path traversal in --dest, FIFO/device DoS, hardlink exfiltration, and commit-trailer forgery
GitHub lists this reviewed advisory for skillctl. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
skillctl
source listed< 0.1.3
## Impact Following the path-safety patches in GHSA-wx3m-whqv-xv47 (v0.1.2), a comprehensive multi-angle audit surfaced five further vulnerabilities, now patched in v0.1.3: 1. **`source_sha` argument injection in `git ls-tree` (CRITICAL).** `InstalledSkill.source_sha` deserialized from `.skills.toml` (committed, PR-mergeable) flowed unvalidated into `git ls-tree -r -z -- `. Because the refspec sits before `--`, an attacker who slipped a malicious `.skills.toml` into a PR could set `source_sha = "--name-only"` / `--abbrev=0` / `--output=…` and corrupt the diff classifier (which drives `pull` / `push` destructive decisions), or forge a divergence state to trick `push --on-divergence overwrite` into clobbering the wrong content. 2. **FIFO / device / socket denial-of-service in `copy_dir_all` (CRITICAL).** The file-type branch only checked `is_dir()` / `is_symlink()`; a FIFO inside a skill folder fell through to `fs::copy`, which blocks indefinitely waiting for a writer. A character device like `/dev/zero` would read until OOM. Reachable on `skillctl add` against any adversarial libra
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-74p7-6h78-gw8p ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.