Ciborg gem for Ruby allows local users to write files and gain privileges via Symlink
Published Jan 10, 2018 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
Ciborg gem for Ruby allows local users to write files and gain privileges via Symlink
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
There is a /tmp file race condition in `chef/travis-cookbooks/ci_environment/perlbrew/recipes/default.rb` in the ciborg gem 3.0.0 when creating `/tmp/perlbrew-installer`. If a malicious local user creates the file first they can overwrite the contents with their own code executing it as the ciborg process owner.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- [oss-security] 20140717 Re: Vulnerability Report for Ruby Gem codders-dataset-1.3.2.1 (etc.) ↗
- www.vapid.dhs.org ↗
- [oss-security] 20140707 Vulnerability Report for Ruby Gem ciborg-3.0.0 ↗
Record history
Published Jan 10, 2018 · Last refreshed Nov 3, 2026