Code Injection in RubyGems - CVE-2019-8324

Vulnerability identifier: #VU20189

CSH Severity: Medium

CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-8324

CWE-ID: CWE-94

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing multiple line entries within gems in ensure_loadable_spec(). A remote attacker can send a specially crafted gem, inject malicious code into stub line of gemspec and execute it code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

RubyGems
Amazon Linux AMI
Red Hat Enterprise Linux Server
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 - TUS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Opensuse
Fedora
EMC Integrated Data Protection Appliance
ruby (Red Hat package)
ruby (Alpine package)
rh-ruby23-ruby (Red Hat package)
rh-ruby24-ruby (Red Hat package)
rh-ruby25-ruby (Red Hat package)
ruby
Dell EMC Data Protection Search

Install updates from vendor's website.

RubyGems - addressed in versions 2.7.9, 3.0.2
EMC Integrated Data Protection Appliance - update to 2.7.1
ruby (Red Hat package) - update to 2.0.0.648-37.el7_4
ruby (Alpine package) - update to 2.4.6-r0
Dell EMC Data Protection Search - update to 19.6.0
rh-ruby23-ruby (Red Hat package) - addressed in versions 2.3.8-70.el6, 2.3.8-70.el7
rh-ruby24-ruby (Red Hat package) - addressed in versions 2.4.6-92.el6, 2.4.6-92.el7
rh-ruby25-ruby (Red Hat package) - update to 2.5.5-7.el7
ruby - addressed in versions 2.5.5-101.fc29, 2.5.5-108.fc28

• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
• https://hackerone.com/reports/328571

• Amazon Linux AMI update for ruby20, ruby21, ruby24
• Multiple vulnerabilities in RubyGems
• OpenSUSE Linux update for ruby-bundled-gems-rpmhelper, ruby2.5
• Red Hat update for ruby
• Red Hat update for ruby:2.5
• Red Hat Enterprise Linux 7 update for ruby
• Code Injection in ruby (Alpine package)
• Multiple vulnerabilities in Dell EMC Integrated Data Protection Appliance
• Multiple vulnerabilities in Dell EMC Data Protection Search
• Red Hat Software Collections update for rh-ruby25-ruby
• Red Hat Software Collections update for rh-ruby24-ruby
• Red Hat Software Collections update for rh-ruby23-ruby
• Fedora 29 update for ruby
• Fedora 28 update for ruby