CVE-2018-1000078

Published: 13 March 2018

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 Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack appear to be exploitable via the victim must browse to a malicious gem on a vulnerable gem server. This vulnerability appears to have been fixed in 2.7.6.

From the Ubuntu Security Team

It was discovered that the RubyGems embedded in JRuby contained a Cross Site Scripting (XSS) vulnerability. If a victim were to browse a malicious gem on a vulnerable gem server, an attacker could execute arbitrary javascript in the victim's browser.

Notes

ruby{1.9.1,2.0,2.3} and jruby ship an embedded rubygems.

Status

Severity score breakdown

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000078
• https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
• https://www.ruby-lang.org/en/news/2018/02/17/multiple-vulnerabilities-in-rubygems/
• https://ubuntu.com/security/notices/USN-3621-1
• NVD
• Launchpad
• Debian