Denial of service in Open vSwitch

1) Out-of-bounds read

EUVDB-ID: #VU68717

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-32166

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the minimasks() function in flow.c. A remote attacker can pass specially crafted data to the application, trigger an out-of-bounds read error and crash the service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Open vSwitch: 0.90.0 - 2.5.0

CPE2.3

• cpe:2.3:h:openvswitch.org:openvswitch:0.90.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.3.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.4.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.4.1:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.4.2:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.5.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.6.1:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.7.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.9.0:*:*:*:*:*:*:*
• cpe:2.3:h:openvswitch.org:openvswitch:1.10.0:*:*:*:*:*:*:*

External links

https://github.com/cloudbase/ovs/commit/2ed6505555cdcb46f9b1f0329d1491b75290fc73
https://bugzilla.redhat.com/show_bug.cgi?id=2130577

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.