Spoofing attack in cgi - CVE-2021-41819

Vulnerability identifier: #VU58365

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-41819

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in CGI::Cookie.parse. A remote attacker can spoof page content.

cgi
Gentoo Linux
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Storage
Anolis OS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Server
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Desktop
openSUSE Leap
Ubuntu
openEuler
Fedora
cflinuxfs3
Red Hat Software Collections
ruby2.5 (Debian package)
rh-ruby26-ruby (Red Hat package)
ruby2.7 (Debian package)
rh-ruby27-ruby (Red Hat package)
rh-ruby30-ruby (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
rubygem-net-telnet
rubygem-rss
rubygem-abrt-doc
rubygem-abrt
rubygem-xmlrpc
rubygem-io-console
rubygem-mysql2-doc
rubygem-mysql2
rubygem-typeprof
rubygem-pg-doc
rubygem-pg
rubygem-irb
rubygem-power_assert
rubygem-did_you_mean
rubygem-bigdecimal
rubygem-rbs
rubygem-bundler-doc
rubygem-bundler
rubygem-json
rubygem-openssl
ruby2.3 (Ubuntu package)
ruby2.5 (Ubuntu package)
rubygem-mongo-doc
rubygem-mongo
ruby-irb
ruby-help
ruby
ruby-devel
ruby-debugsource
ruby-debuginfo
ruby-doc
ruby-libs
ruby2.5-stdlib
ruby2.5-doc
ruby2.5-devel-extra
ruby2.5-devel
ruby2.5-debugsource
ruby2.5-debuginfo
ruby2.5
libruby2_5-2_5-debuginfo
libruby2_5-2_5
ruby2.5-stdlib-debuginfo
ruby2.5-doc-ri
ruby2.7 (Ubuntu package)
rubygems-devel
rubygems
ruby-default-gems
rubygem-psych
rubygem-rexml
rubygem-test-unit
rubygem-bson-doc
rubygem-bson
rubygem-minitest
rubygem-rdoc
rubygem-rake

Install updates from vendor's website.

cgi - addressed in versions 0.1.1, 0.2.1, 0.3.1
cflinuxfs3 - update to 0.272.0
ruby2.5 (Debian package) - update to 2.5.5-3+deb10u4
rh-ruby26-ruby (Red Hat package) - update to 2.6.9-120.el7
ruby2.7 (Debian package) - update to 2.7.4-1+deb11u1
rh-ruby27-ruby (Red Hat package) - update to 2.7.6-131.el7
rh-ruby30-ruby (Red Hat package) - update to 3.0.4-149.el7
rubygem-net-telnet - addressed in versions 0.1.1-110.0.1, 0.2.0-108, 0.2.0-138.0.1
rubygem-net-telnet - update to 0.1.1-115
rubygem-rss - update to 0.2.9-141.0.1
rubygem-abrt-doc - addressed in versions 0.3.0-4, 0.4.0-1
rubygem-abrt - addressed in versions 0.3.0-4, 0.4.0-1
rubygem-xmlrpc - addressed in versions 0.3.0-108, 0.3.0-110.0.1, 0.3.0-138.0.1
rubygem-xmlrpc - update to 0.3.0-115
rubygem-io-console - addressed in versions 0.4.6-110.0.1, 0.4.7-108, 0.5.6-138.0.1, 0.5.7-141.0.1
rubygem-io-console - update to 0.4.6-115
rubygem-mysql2-doc - addressed in versions 0.4.10-4, 0.5.3-1
rubygem-mysql2 - addressed in versions 0.4.10-4, 0.5.3-1
rubygem-typeprof - update to 0.15.2-141.0.1
rubygem-pg-doc - addressed in versions 1.0.0-2.0.1, 1.1.4-1, 1.2.3-1, 1.2.3-1.0.1
rubygem-pg - addressed in versions 1.0.0-2.0.1, 1.1.4-1, 1.2.3-1, 1.2.3-1.0.1
rubygem-irb - addressed in versions 1.0.0-108, 1.2.6-138.0.1, 1.3.5-141.0.1
rubygem-power_assert - addressed in versions 1.1.1-110.0.1, 1.1.3-108, 1.1.7-138.0.1, 1.2.0-141.0.1
rubygem-power_assert - update to 1.1.1-115
rubygem-did_you_mean - addressed in versions 1.2.0-110.0.1, 1.3.0-108
rubygem-did_you_mean - update to 1.2.0-115
rubygem-bigdecimal - addressed in versions 1.3.4-110.0.1, 1.4.1-108, 2.0.0-138.0.1, 3.0.0-141.0.1
rubygem-bigdecimal - update to 1.3.4-115
rubygem-rbs - update to 1.4.0-141.0.1
rubygem-bundler-doc - update to 1.16.1-4
rubygem-bundler - addressed in versions 1.16.1-4, 1.17.2-108, 2.2.24-138.0.1, 2.2.33-141.0.1
rubygem-json - addressed in versions 2.1.0-108, 2.1.0-110.0.1, 2.3.0-138.0.1, 2.5.1-141.0.1
rubygem-json - update to 2.1.0-115
rubygem-openssl - addressed in versions 2.1.2-108, 2.1.2-110.0.1, 2.1.3-138.0.1
rubygem-openssl - update to 2.1.2-115
ruby2.3 (Ubuntu package) - update to 2.3.12~ubuntu16.04.16+esm3
ruby2.5 (Ubuntu package) - update to 2.5.1-1ubuntu1.11
rubygem-mongo-doc - addressed in versions 2.5.1-2, 2.8.0-1, 2.11.3-1
rubygem-mongo - addressed in versions 2.5.1-2, 2.8.0-1, 2.11.3-1
ruby-irb - update to 2.5.8-115
ruby-help - update to 2.5.8-115
ruby - update to 2.5.8-115
ruby-devel - update to 2.5.8-115
ruby-debugsource - update to 2.5.8-115
ruby-debuginfo - update to 2.5.8-115
ruby - addressed in versions 2.5.9-110.0.1, 2.6.9-108, 2.7.6-138.0.1, 3.0.4-141.0.1
ruby-devel - addressed in versions 2.5.9-110.0.1, 2.6.9-108, 2.7.6-138.0.1, 3.0.4-141.0.1
ruby-irb - update to 2.5.9-110.0.1
ruby-doc - addressed in versions 2.5.9-110.0.1, 2.6.9-108, 2.7.6-138.0.1, 3.0.4-141.0.1
ruby-libs - addressed in versions 2.5.9-110.0.1, 2.6.9-108, 2.7.6-138.0.1, 3.0.4-141.0.1
ruby2.5-stdlib - update to 2.5.9-150000.4.26.1
ruby2.5-doc - update to 2.5.9-150000.4.26.1
ruby2.5-devel-extra - update to 2.5.9-150000.4.26.1
ruby2.5-devel - update to 2.5.9-150000.4.26.1
ruby2.5-debugsource - update to 2.5.9-150000.4.26.1
ruby2.5-debuginfo - update to 2.5.9-150000.4.26.1
ruby2.5 - update to 2.5.9-150000.4.26.1
libruby2_5-2_5-debuginfo - update to 2.5.9-150000.4.26.1
libruby2_5-2_5 - update to 2.5.9-150000.4.26.1
ruby2.5-stdlib-debuginfo - update to 2.5.9-150000.4.26.1
ruby2.5-doc-ri - update to 2.5.9-150000.4.26.1
ruby2.7 (Ubuntu package) - addressed in versions 2.7.0-5ubuntu1.6, 2.7.2-4ubuntu1.3, 2.7.4-1ubuntu3.1
rubygems-devel - addressed in versions 2.7.6.3-110.0.1, 3.0.3.1-108, 3.1.6-138.0.1, 3.2.33-141.0.1
rubygems - addressed in versions 2.7.6.3-110.0.1, 3.0.3.1-108, 3.1.6-138.0.1, 3.2.33-141.0.1
rubygems-devel - update to 2.7.6-115
rubygems - update to 2.7.6-115
ruby-default-gems - addressed in versions 2.7.6-138.0.1, 3.0.4-141.0.1
rubygem-psych - addressed in versions 3.0.2-110.0.1, 3.1.0-108, 3.1.0-138.0.1, 3.3.2-141.0.1
rubygem-psych - update to 3.0.2-115
ruby - addressed in versions 3.0.4-153.fc34, 3.0.4-153.fc35
rubygem-rexml - update to 3.2.5-141.0.1
rubygem-test-unit - addressed in versions 3.2.7-110.0.1, 3.2.9-108, 3.3.4-138.0.1, 3.3.7-141.0.1
rubygem-test-unit - update to 3.2.7-115
rubygem-bson-doc - addressed in versions 4.3.0-2, 4.5.0-1, 4.8.1-1
rubygem-bson - addressed in versions 4.3.0-2, 4.5.0-1, 4.8.1-1
rubygem-minitest - addressed in versions 5.10.3-110.0.1, 5.11.3-108, 5.13.0-138.0.1, 5.14.2-141.0.1
rubygem-minitest - update to 5.10.3-115
rubygem-rdoc - addressed in versions 6.0.1.1-110.0.1, 6.1.2.1-108, 6.2.1.1-138.0.1, 6.3.3-141.0.1
rubygem-rdoc - update to 6.0.1.1-115
rubygem-rake - update to 12.3.0-115
rubygem-rake - addressed in versions 12.3.3-108, 12.3.3-110.0.1, 13.0.1-138.0.1, 13.0.3-141.0.1

• https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/

• Multiple vulnerabilities in Ruby cgi gem
• Multiple vulnerabilities in cflinuxfs3
• Debian update for ruby2.5
• Debian update for ruby2.7
• Red Hat Enterprise Linux 8.4 update for the ruby:2.6 module
• Red Hat Enterprise Linux 8 update for the ruby:2.6 module
• Red Hat Enterprise Linux 8.1 update for the ruby:2.6 module
• Red Hat Enterprise Linux 8.2 update for the ruby:2.6 module
• Red Hat Software Collections update for rh-ruby26-ruby
• Ubuntu update for ruby2.3
• Red Hat Enterprise Linux 8 update for the ruby:2.5 module
• Red Hat Enterprise Linux 8 update for the ruby:3.0 module
• Red Hat Enterprise Linux 8 update for the ruby:2.7 module
• SUSE update for ruby2.5
• Red Hat Software Collections update for rh-ruby27-ruby
• Red Hat Software Collections update for rh-ruby30-ruby
• Gentoo update for Ruby
• openEuler update for ruby
• Fedora 35 update for ruby
• Fedora 34 update for ruby
• Anolis OS update for ruby:2.5 module
• Anolis OS update for ruby:2.7 module
• Anolis OS update for ruby:3.0 module
• Anolis OS update for ruby:2.6 module