#VU24172 Use-after-free in Linux kernel - CVE-2019-15917

Vulnerability identifier: #VU24172

Vulnerability risk: Low

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

CVE-ID: CVE-2019-15917

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when hci_uart_register_dev() fails in hci_uart_set_proto() in drivers/bluetooth/hci_ldisc.c. A remote attacker with physical proximity to the system can send specially crafted Bluetoth data and execute arbitrary code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.0.4

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External links
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.5
https://github.com/torvalds/linux/commit/56897b217a1d0a91c9920cb418d6b3fe922f590a
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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