Missing Authorization in Jenkins LTS and Jenkins - CVE-2021-21691

Vulnerability identifier: #VU57984

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-21691

CWE-ID: CWE-862

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to creating symbolic links is possible without the symlink permission. A remote attacker can compromise the target system.

Jenkins LTS
Jenkins
Arch Linux
coreos-installer (Red Hat package)
cri-o (Red Hat package)
jenkins (Red Hat package)
container-selinux (Red Hat package)
python-sushy (Red Hat package)
atomic-openshift (Red Hat package)
openshift-ansible (Red Hat package)
atomic-openshift-cluster-autoscaler (Red Hat package)
golang-github-prometheus-alertmanager (Red Hat package)
atomic-openshift-service-idler (Red Hat package)
atomic-openshift-metrics-server (Red Hat package)
atomic-openshift-node-problem-detector (Red Hat package)
openshift-enterprise-autoheal (Red Hat package)
atomic-openshift-web-console (Red Hat package)
atomic-openshift-descheduler (Red Hat package)
openshift-enterprise-cluster-capacity (Red Hat package)
golang-github-openshift-oauth-proxy (Red Hat package)
golang-github-prometheus-node_exporter (Red Hat package)
atomic-enterprise-service-catalog (Red Hat package)
golang-github-prometheus-prometheus (Red Hat package)
atomic-openshift-dockerregistry (Red Hat package)
openshift-kuryr (Red Hat package)
jenkins-2-plugins (Red Hat package)
openshift (Red Hat package)
Red Hat OpenShift Container Platform

Install updates from vendor's website.

Jenkins LTS - update to 2.303.3
Jenkins - update to 2.319
coreos-installer (Red Hat package) - update to 0.9.0-8.rhaos4.8.el8
cri-o (Red Hat package) - addressed in versions 1.20.6-3.rhaos4.7.git4603183.el7, 1.20.6-3.rhaos4.7.git4603183.el8, 1.21.4-3.rhaos4.8.git84fa55d.el7, 1.21.4-3.rhaos4.8.git84fa55d.el8, 1.22.1-4.rhaos4.9.gite3dfe61.el7, 1.22.1-4.rhaos4.9.gite3dfe61.el8
jenkins (Red Hat package) - addressed in versions 2.303.3.1637595827-1.el8, 2.303.3.1637596565-1.el8, 2.303.3.1637597018-1.el8, 2.303.3.1637597493-1.el8, 2.303.3.1637698110-1.el7
container-selinux (Red Hat package) - update to 2.170.0-2.rhaos4.9.el8
python-sushy (Red Hat package) - addressed in versions 3.7.4-0.20211119091058.2cc60dc.el8, 3.12.1-0.20211122142104.806622c.el8
Red Hat OpenShift Container Platform - addressed in versions 3.11.569, 4.6.51, 4.7.38, 4.8.22, 4.9.9
atomic-openshift (Red Hat package) - update to 3.11.569-1.git.0.9dc951a.el7
openshift-ansible (Red Hat package) - update to 3.11.569-1.git.0.9620ba1.el7
atomic-openshift-cluster-autoscaler (Red Hat package) - update to 3.11.569-1.g99b2acf.el7
golang-github-prometheus-alertmanager (Red Hat package) - update to 3.11.569-1.g13de638.el7
atomic-openshift-service-idler (Red Hat package) - update to 3.11.569-1.g39cfc66.el7
atomic-openshift-metrics-server (Red Hat package) - update to 3.11.569-1.gf8bf728.el7
atomic-openshift-node-problem-detector (Red Hat package) - update to 3.11.569-1.gc8f26da.el7
openshift-enterprise-autoheal (Red Hat package) - update to 3.11.569-1.gf2f435d.el7
atomic-openshift-web-console (Red Hat package) - update to 3.11.569-1.g3e485e6.el7
atomic-openshift-descheduler (Red Hat package) - update to 3.11.569-1.gd435537.el7
openshift-enterprise-cluster-capacity (Red Hat package) - update to 3.11.569-1.g22be164.el7
golang-github-openshift-oauth-proxy (Red Hat package) - update to 3.11.569-1.gedebe84.el7
golang-github-prometheus-node_exporter (Red Hat package) - update to 3.11.569-1.g609cd20.el7
atomic-enterprise-service-catalog (Red Hat package) - update to 3.11.569-1.g2e6be86.el7
golang-github-prometheus-prometheus (Red Hat package) - update to 3.11.569-1.g99aae51.el7
atomic-openshift-dockerregistry (Red Hat package) - update to 3.11.569-1.g3571208.el7
openshift-kuryr (Red Hat package) - addressed in versions 3.11.569-1.g0c4bf66.el7, 4.6.0-202111041131.p0.git.7c5a4f7.assembly.stream.el8, 4.8.0-202111221627.p0.g43dd2f6.assembly.stream.el8, 4.9.0-202111221622.p0.g473fd0c.assembly.stream.el8
jenkins-2-plugins (Red Hat package) - addressed in versions 3.11.1637699107-1.el7, 4.6.1637602169-1.el8, 4.7.1637600997-1.el8, 4.8.1637599935-1.el8, 4.9.1637598812-1.el8
openshift (Red Hat package) - addressed in versions 4.6.0-202111100230.p0.git.6063298.assembly.stream.el7, 4.6.0-202111100230.p0.git.6063298.assembly.stream.el8, 4.7.0-202111192046.p0.gaa025a0.assembly.stream.el7, 4.7.0-202111192046.p0.gaa025a0.assembly.stream.el8, 4.8.0-202111221934.p0.g81bc627.assembly.stream.el7, 4.8.0-202111221934.p0.g81bc627.assembly.stream.el8, 4.9.0-202111231108.p0.g4dd1b5a.assembly.stream.el7, 4.9.0-202111231108.p0.g4dd1b5a.assembly.stream.el8

• https://jenkins.io/security/advisory/2021-11-04/

• Multiple vulnerabilities in Jenkins and Jenkins LTS
• Arch Linux update for jenkins
• Multiple vulnerabilities in OpenShift Container Platform 4.9
• Multiple vulnerabilities in OpenShift Container Platform 4.8
• Multiple vulnerabilities in OpenShift Container Platform 4.7
• Multiple vulnerabilities in OpenShift Container Platform 3.11
• Multiple vulnerabilities in OpenShift Container Platform 4.6