Path traversal in RubyGems - CVE-2019-8320

Vulnerability identifier: #VU20193

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-8320

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in gems. A remote attacker can trick the victim to load a specially crafted gem and delete arbitrary files on the system.

RubyGems
Amazon Linux AMI
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Opensuse
Fedora
EMC Integrated Data Protection Appliance
ruby (Alpine 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 (Alpine package) - update to 2.4.6-r0
Dell EMC Data Protection Search - update to 19.6.0
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

• https://access.redhat.com/errata/RHSA-2019:1429
• https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
• https://hackerone.com/reports/317321

• Amazon Linux AMI update for ruby20, ruby21, ruby24
• Multiple vulnerabilities in RubyGems
• OpenSUSE Linux update for ruby-bundled-gems-rpmhelper, ruby2.5
• Red Hat Enterprise Linux 8 update for the ruby:2.5 module
• Path traversal 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
• Fedora 29 update for ruby
• Fedora 28 update for ruby