Red Hat OpenStack update for Eventlet

1) Resource exhaustion

EUVDB-ID: #VU56244

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

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

External links

http://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.