Improper resource shutdown or release in Linux kernel mptcp

1) Improper resource shutdown or release

EUVDB-ID: #VU108510

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-53072

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

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

The vulnerability exists due to failure to properly release resources within the subflow_hmac_valid(), subflow_ulp_fallback(), mptcp_subflow_queue_clean() and subflow_ulp_release() functions in net/mptcp/subflow.c, within the __mptcp_close_ssk(), mptcp_sync_mss(), __mptcp_close_subflow(), mptcp_worker(), mptcp_sk_clone(), mptcp_accept() and mptcp_stream_accept() functions in net/mptcp/protocol.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.3 rc6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.1.6:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/2827f099b3fb9a59263c997400e9182f5d423e84
https://git.kernel.org/stable/c/804cf487fb0031f3c74755b78d8663333f0ba636
https://git.kernel.org/stable/c/b6985b9b82954caa53f862d6059d06c0526254f0
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.22
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3

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.