#VU28401 NULL pointer dereference in Linux kernel - CVE-2019-10207

Vulnerability identifier: #VU28401

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10207

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

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

A flaw was found in the Linux kernel's Bluetooth implementation of UART, all versions kernel 3.x.x before 4.18.0 and kernel 5.x.x. An attacker with local access and write permissions to the Bluetooth hardware could use this flaw to issue a specially crafted ioctl function call and cause the system to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.14 - 4.14.135, 5.0 - 5.0.21, 5.1 rc1 - 5.1.21, 5.2 - 5.2.21

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External links
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.136
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3

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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.