Privilege escalation in Linux kernel nfc support

1) Race condition

EUVDB-ID: #VU88106

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52502

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition within the nfc_llcp_sock_get() and nfc_llcp_sock_get_sn() functions in net/nfc/llcp_core.c. A local user can exploit the race and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.19 - 6.6 rc6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.19:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.19.9:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/e863f5720a5680e50c4cecf12424d7cc31b3eb0a
https://git.kernel.org/stable/c/7adcf014bda16cdbf804af5c164d94d5d025db2d
https://git.kernel.org/stable/c/6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9
https://git.kernel.org/stable/c/d888d3f70b0de32b4f51534175f039ddab15eef8
https://git.kernel.org/stable/c/e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc
https://git.kernel.org/stable/c/d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c
https://git.kernel.org/stable/c/31c07dffafce914c1d1543c135382a11ff058d93
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.297
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.199
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.136
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.259
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.59
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6

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.