#VU18377 Resource exhaustion in Linux kernel - CVE-2019-3882

Vulnerability identifier: #VU18377

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-3882

CWE-ID: CWE-400

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists within Linux kernel's vfio interface implementation, related to incorrect permission management. A local user with administrative privileges of the device, connected to vfio-pci interface can exhaust all system resources and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.4 - 4.4.179, 4.9 - 4.9.172, 4.14.0 rc1 - 4.19.37

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External links
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.115
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.173
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.180
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.38

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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.