Improper input validation in RubyGems - CVE-2018-1000077

Vulnerability identifier: #VU11628

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-1000077

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote unauthenticated attacker to write arbitrary files on the target system.

The weakness exists due to improper URL validation of the specification homepage attribute. A remote attacker can trick the victim into installing a malicious RubyGems gem and set an invalid homepage URL.

RubyGems
Debian Linux
Amazon Linux AMI
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power
Opensuse
Fedora
EMC Integrated Data Protection Appliance
Dell EMC Data Protection Search
ruby

Update to version 2.7.6.

EMC Integrated Data Protection Appliance - update to 2.7.1
Dell EMC Data Protection Search - update to 19.6.0
ruby - addressed in versions 2.4.3-87.fc26, 2.4.3-87.fc27

• https://blog.rubygems.org/2018/02/15/2.7.6-released.html

• Multiple vulnerabilities in RubyGems
• Amazon Linux AMI update for ruby20, ruby22, ruby23, ruby24
• Debian update for jruby
• Debian update for ruby2.3
• Red Hat update for ruby
• Red Hat update for ruby
• Red Hat update for ruby
• Red Hat update for ruby
• OpenSUSE Linux update for ruby-bundled-gems-rpmhelper, ruby2.5
• Red Hat update for ruby
• Red Hat Enterprise Linux Server 7.4 update for ruby
• Red Hat Enterprise Linux 7.6 update for ruby
• Multiple vulnerabilities in Dell EMC Integrated Data Protection Appliance
• Multiple vulnerabilities in Dell EMC Data Protection Search
• Fedora 27 update for ruby
• Fedora 26 update for ruby