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Ciborg gem for Ruby allows local users to write files and gain privileges via Symlink

Moderate severity GitHub Reviewed Published Jul 23, 2018 to the GitHub Advisory Database • Updated Nov 8, 2023

Package

bundler ciborg (RubyGems)

Affected versions

= 3.0.0

Patched versions

None

Description

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.

References

Published by the National Vulnerability Database Jan 10, 2018
Published to the GitHub Advisory Database Jul 23, 2018
Reviewed Jun 16, 2020
Last updated Nov 8, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.042%
(5th percentile)

Weaknesses

CVE ID

CVE-2014-5003

GHSA ID

GHSA-g982-9r8g-6qxw

Source code

No known source code
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