CVE-2018-1000076: Critical severity Rubygems RubyGems vulnerability
Improper verification of signatures in tarball allows to install mis-signed gem when tarball contain multiple gem signatures.
Upstream fix:
https://github.com/rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693
External References:
https://www.ruby-lang.org/en/news/2018/02/17/multiple-vulnerabilities-in-rubygems/
Other sources
RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a mis-signed gem could be installed, as the tarball would contain multiple gem signatures.. This vulnerability appears to have been fixed in 2.7.6.
— Launchpad
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID for this RubyGems vulnerability?
The vulnerability ID for this RubyGems vulnerability is CVE-2018-1000076.
What is the severity of CVE-2018-1000076?
The severity of CVE-2018-1000076 is medium.
Which versions of RubyGems are affected by CVE-2018-1000076?
RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 are affected by CVE-2018-1000076.
How do I fix CVE-2018-1000076?
To fix CVE-2018-1000076, update RubyGems to version 2.7.6 or later.
Where can I find more information about CVE-2018-1000076?
You can find more information about CVE-2018-1000076 in the following references: http://blog.rubygems.org/2018/02/15/2.7.6-released.html, https://github.com/rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693, https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html