Privilege escalation in DPDK

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

DPDK: - - 21.11.1

CPE2.3

• cpe:2.3:a:dpdk:dpdk:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:2.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:2.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:16.11.11:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:17.11.10:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:18.11.11:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:19.11.12:*:*:*:*:*:*:*
• cpe:2.3:a:dpdk:dpdk:20.11.5:*:*:*:*:*:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=2025882

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.