Fast Datapath for Red Hat Enterprise Linux 8 update for openvswitch2.15

1) Out-of-bounds write

EUVDB-ID: #VU63625

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

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

Red Hat Enterprise Linux Fast Datapath (for RHEL for ARM 64): 8

Red Hat Enterprise Linux Fast Datapath (for IBM z Systems): 8

Red Hat Enterprise Linux Fast Datapath (for RHEL Server for IBM Power LE): 8

Red Hat Enterprise Linux Fast Datapath: 8

openvswitch2.15 (Red Hat package): before 2.15.0-99.el8fdp

CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_rhel_for_arm_64:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_ibm_z_systems:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_rhel_server_for_ibm_power_le:8:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_enterprise_linux_fast_datapath:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:openvswitch2.15_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2022:4787

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

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-0669

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to DPDK incorrectly handles inflight type messages. A local user can exhaust available fd in the vhost-user slave process and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Fast Datapath (for RHEL for ARM 64): 8

Red Hat Enterprise Linux Fast Datapath (for IBM z Systems): 8

Red Hat Enterprise Linux Fast Datapath (for RHEL Server for IBM Power LE): 8

Red Hat Enterprise Linux Fast Datapath: 8

openvswitch2.15 (Red Hat package): before 2.15.0-99.el8fdp

CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_rhel_for_arm_64:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_ibm_z_systems:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_fast_datapath_for_rhel_server_for_ibm_power_le:8:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_enterprise_linux_fast_datapath:8:*:*:*:*:*:*:*
• cpe:2.3:o:red_hat:openvswitch2.15_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2022:4787

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.