CVE-2018-1000076 Explained : Impact and Mitigation
Learn about CVE-2018-1000076, a vulnerability in RubyGems allowing mis-signed gem installations. Find out affected systems, exploitation risks, and mitigation steps.
A vulnerability in package.rb in RubyGems versions up to Ruby 2.2.9 in the Ruby 2.2 series, up to Ruby 2.3.6 in the Ruby 2.3 series, up to Ruby 2.4.3 in the Ruby 2.4 series, up to Ruby 2.5.0 in the Ruby 2.5 series, and prior to revision 62422 in the trunk allows for the installation of a mis-signed gem due to multiple gem signatures in the tarball. The issue has been fixed in version 2.7.6.
Understanding CVE-2018-1000076
This CVE involves a vulnerability in RubyGems that could lead to the installation of mis-signed gems.
What is CVE-2018-1000076?
The vulnerability in package.rb in RubyGems versions up to specific versions in different Ruby series allows the installation of mis-signed gems due to multiple gem signatures in the tarball.
The Impact of CVE-2018-1000076
The vulnerability could potentially allow malicious actors to install mis-signed gems, compromising the integrity of the software installation process.
Technical Details of CVE-2018-1000076
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability in package.rb in RubyGems versions up to specific versions in different Ruby series allows the installation of mis-signed gems due to multiple gem signatures in the tarball.
Affected Systems and Versions
- RubyGems versions up to Ruby 2.2.9 in the Ruby 2.2 series
- RubyGems versions up to Ruby 2.3.6 in the Ruby 2.3 series
- RubyGems versions up to Ruby 2.4.3 in the Ruby 2.4 series
- RubyGems versions up to Ruby 2.5.0 in the Ruby 2.5 series
- Versions prior to revision 62422 in the trunk
Exploitation Mechanism
The vulnerability allows the installation of mis-signed gems by including multiple gem signatures in the tarball, potentially leading to unauthorized software installation.
Mitigation and Prevention
Protecting systems from CVE-2018-1000076 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update RubyGems to version 2.7.6 or later to mitigate the vulnerability
- Verify the authenticity of gem installations to prevent mis-signed gems
Long-Term Security Practices
- Regularly update software components to patch known vulnerabilities
- Implement secure coding practices to prevent similar issues in the future
Patching and Updates
Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities.