Red Hat Enterprise Linux Fast Datapath 8 update for openvswitch

Published: 2022-05-30

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3839 CVE-2022-0669
CWE-ID	CWE-787 CWE-400
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	openvswitch2.16 (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Fast Datapath Client/Desktop applications / File managers, FTP clients
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU63625

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3839

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to vhost_user_set_inflight_fd() function does not validate msg->payload.inflight.num_queues. A local user can trigger out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

openvswitch2.16 (Red Hat package): 2.16.0-15.el8fdp - 2.16.0-33.el8fdp

Red Hat Enterprise Linux Fast Datapath: 8

External links

http://access.redhat.com/errata/RHSA-2022:4788

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Resource exhaustion

EUVDB-ID: #VU63630