Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU51604
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-28363
CWE-ID:
CWE-297 - Improper Validation of Certificate with Host Mismatch
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to urllib3 library for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given
via proxy_config) doesn't verify the hostname of the certificate. This
means certificates for different servers that still validate properly
with the default urllib3 SSLContext will be silently accepted. A remote attacker can supply a valid SSL certificate for a different hostname and perform Man-in-the-Middle (MitM) attack.
Install updates from vendor's website.
Red Hat OpenShift Container Platform: 3.11.0 - 3.11.394
openshift-kuryr (Red Hat package): 3.11.153-1.git.1.073ef06.el7 - 3.11.404-1.git.1494.91fb403.el7
openshift-enterprise-cluster-capacity (Red Hat package): 3.11.16-1.git.380.1406f2f.el7 - 3.11.404-1.git.379.e6e2a1d.el7
openshift-enterprise-autoheal (Red Hat package): 3.11.16-1.git.219.5443970.el7 - 3.11.404-1.git.218.c348621.el7
openshift-ansible (Red Hat package): 3.11.16-1.git.0.4ac6f81.el7 - 3.11.404-1.git.0.d161108.el7
golang-github-prometheus-prometheus (Red Hat package): 3.11.16-1.git.5020.5e81ed1.el7 - 3.11.404-1.git.5026.5f1d705.el7
golang-github-prometheus-node_exporter (Red Hat package): 3.11.16-1.git.1056.1583d2a.el7 - 3.11.404-1.git.1062.611825d.el7
golang-github-prometheus-alertmanager (Red Hat package): 3.11.16-1.git.0.be735ec.el7 - 3.11.404-1.git.0.2817295.el7
golang-github-openshift-oauth-proxy (Red Hat package): 3.11.16-1.git.409.922769e.el7 - 3.11.404-1.git.439.06870e9.el7
atomic-openshift-web-console (Red Hat package): 3.11.16-1.git.289.ecf7441.el7 - 3.11.404-1.git.677.0e37db7.el7
atomic-openshift-service-idler (Red Hat package): 3.11.16-1.git.14.a65cbf0.el7 - 3.11.404-1.git.15.6c64591.el7
atomic-openshift-node-problem-detector (Red Hat package): 3.11.16-1.git.198.95f4dfa.el7 - 3.11.400-1.git.263.930aa57.el7
atomic-openshift-metrics-server (Red Hat package): 3.11.16-1.git.52.9fd74a8.el7 - 3.11.404-1.git.53.b9081b6.el7
atomic-openshift-dockerregistry (Red Hat package): 3.11.51-1.git.446.d29ce0e.el7 - 3.11.404-1.git.481.5000e2c.el7
atomic-openshift-descheduler (Red Hat package): 3.11.16-1.git.300.abfab3c.el7 - 3.11.404-1.git.299.2bfbb2f.el7
atomic-openshift-cluster-autoscaler (Red Hat package): 3.11.16-1.git.0.8c8305e.el7 - 3.11.404-1.git.0.2c258fe.el7
atomic-openshift (Red Hat package): 3.11.16-1.git.0.b48b8f8.el7 - 3.11.404-1.git.0.dd58619.el7
atomic-enterprise-service-catalog (Red Hat package): 3.11.16-1.git.1633.05087cb.el7 - 3.11.404-1.git.1675.3094ee9.el7
python-urllib3 (Red Hat package): 1.24.3-1.el7
python-lockfile (Red Hat package): 0.11.0-10.el7 - 0.11.0-10.el7ar
ansible-runner (Red Hat package): 1.1.2-2.el7ar
python-ptyprocess (Red Hat package): 0.5.2-3.el7
python-pexpect (Red Hat package): 4.6-1.el7
python-daemon (Red Hat package): 2.1.2-7.el7
python-psutil (Red Hat package): before 5.4.3-3.el7ar
External linkshttp://access.redhat.com/errata/RHBA-2021:1147
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.