Denial of service in Red Hat Virtualization 4

1) Incorrect Regular Expression

EUVDB-ID: #VU65835

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-31129

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of user-supplied input when parsing overly long strings. A remote attacker can pass a string that contains more that 10k characters and perform regular expression denial of service (ReDoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

vdsm (Red Hat package): 4.50.0.13-1.el8ev

ovirt-hosted-engine-setup (Red Hat package): 2.6.3-1.el8ev

mom (Red Hat package): 0.6.2-1.el8ev

cockpit-ovirt (Red Hat package): 0.16.0-1.el8ev

Red Hat Virtualization Host: 4

Red Hat Virtualization for IBM Power LE: 4

Red Hat Virtualization: 4

ovirt-host (Red Hat package): before 4.5.0-3.1.el8ev

External links

http://access.redhat.com/errata/RHSA-2022:6392

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.