Use-after-free in Ruby on Rails - CVE-2021-22904

Vulnerability identifier: #VU53004

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-22904

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in the Token Authentication logic in Action Controller. A remote attacker can send a specially crafted request and cause a denial of service condition on the target system. 

Ruby on Rails
IBM Cloud Pak for Multicloud Management
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Performance Computing
openSUSE Leap
openEuler
rails (Debian package)
ruby2.5-rubygem-activesupport-5_1
ruby2.5-rubygem-activesupport-doc-5_1
ruby2.5-rubygem-actionpack-5_1
ruby2.5-rubygem-actionpack-doc-5_1
rubygem-actionpack
rubygem-actionpack-doc

Install updates from vendor's website.

Ruby on Rails - addressed in versions 5.2.4.6, 5.2.6, 6.0.3.7, 6.1.3.2
rails (Debian package) - update to 2:5.2.2.1+dfsg-1+deb10u3
ruby2.5-rubygem-activesupport-5_1 - update to 5.1.4-150000.3.6.1
ruby2.5-rubygem-activesupport-doc-5_1 - update to 5.1.4-150000.3.6.1
ruby2.5-rubygem-actionpack-5_1 - update to 5.1.4-150000.3.12.1
ruby2.5-rubygem-actionpack-doc-5_1 - update to 5.1.4-150000.3.12.1
rubygem-actionpack - update to 5.2.4.4-3
rubygem-actionpack-doc - update to 5.2.4.4-3

• https://seclists.org/oss-sec/2021/q2/102

• Multiple vulnerabilities in Ruby on Rails
• Debian update for rails
• SUSE update for rubygem-actionpack-5_1, rubygem-activesupport-5_1
• Multiple vulnerabilities in IBM Cloud Pak for Multicloud Management Infrastructure Management
• openEuler 20.03 LTS SP1 update for rubygem-actionpack