#VU99546 Resource management error in FreeBSD - CVE-2024-39281

Vulnerability identifier: #VU99546

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-39281

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources in ctl(4) subsystem. The command ctl_persistent_reserve_out allows the caller to specify an arbitrary size which will be passed to the kernel's memory allocator. A malicious guest can pass an overly large value to the allocator and consume all available memory resources on the system, resulting in a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.3 - 14.1

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External links
https://www.freebsd.org/security/advisories/FreeBSD-SA-24:18.ctl.asc

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.