Fast Datapath for Red Hat Enterprise Linux 7 update for openvswitch2.11

1) Resource management error

EUVDB-ID: #VU66871

Risk: Medium

CVSSv4.0: 5.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2022-2132

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the copy_desc_to_mbuf() function when processing Vhost header. A remote guest can send a packet with the Vhost header crossing more than two descriptors and force application to allocate all available mbufs, causing a denial of service condition for the other guest running on the hypervisor.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

openvswitch2.11 (Red Hat package): 2.11.3-77.el7fdp - 2.11.3-89.el7fdp

Red Hat Enterprise Linux Fast Datapath: 7

CPE2.3

• cpe:2.3:o:red_hat:openvswitch2.11_redhat_package:2.11.3-77.el7fdp:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:openvswitch2.11_redhat_package:2.11.3-86.el7fdp:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:openvswitch2.11_redhat_package:2.11.3-89.el7fdp:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:red_hat_enterprise_linux_fast_datapath:7:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2022:6850

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.