Red Hat OpenStack update for Eventlet

1) Resource exhaustion

EUVDB-ID: #VU56244

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21419

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when handling large websocket frames. A remote attacker can trigger resource exhaustion by sending highly compressed data frame and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenStack for IBM Power: 16.1

Red Hat OpenStack: 16.1

Red Hat OpenStack Director Deployment Tools for IBM Power: 16.1

Red Hat OpenStack Director Deployment Tools: 16.1

python-eventlet (Red Hat package): before 0.25.2-5.el8ost.1

CPE2.3

• cpe:2.3:a:red_hat:red_hat_openstack_for_ibm_power:16.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openstack:16.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openstack_director_deployment_tools_for_ibm_power:16.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openstack_director_deployment_tools:16.1:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:python-eventlet_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2021:5071

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.