Privilege escalation in FreeBSD umtx



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-43102
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
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FreeBSD
Operating systems & Components / Operating system

Vendor FreeBSD Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU99515

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-43102

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the _umtx_op(2) system call. A local user can run the UMTX_SHM_DESTROY sub-request in parallel to trigger a use-after-free error and execute arbitrary code or escape Capsicum sandbox.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.3 - 14.1

CPE2.3 External links

http://security.freebsd.org/advisories/FreeBSD-SA-24:14.umtx.asc


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.



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