Denial of service in FreeBSD ctl CAM Target Layer

1) Resource management error

EUVDB-ID: #VU99546

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 - Resource Management Errors

Exploit availability: No

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

CPE2.3

• cpe:2.3:o:freebsd_foundation:freebsd:13.3:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:13.4:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:14.0:*:*:*:*:*:*:*

External links

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

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.