Vulnerability identifier: #VU8329

Vulnerability risk: Low

CVSSv3.1: 8.6 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-1000251

CWE-ID: CWE-121

Exploitation vector: Local network

Exploit availability: Yes

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system
linux_kernel (Debian package)
Operating systems & Components / Operating system package or component

Vendor: Linux Foundation
Debian

Description
The vulnerability allows an adjacent attacker to execute arbitrary code on the host system.

The weakness exists due to a stack-based buffer overflow in the processing of L2CAP configuration. An adjacent attacker can submit a specially crafted Bluetooth protocol, trigger memory corruption in the Bluetooth stack and execute arbitrary code in kernel space.

Successful exploitation of the vulnerability may result in host system compromise.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.9 - 4.9.49, 4.12.1 - 4.12.12, 4.13 rc6 - 4.13.1, 4.4.0 - 4.4.87, 4.1 - 4.1.43, 4.11.1 - 4.11.12, 4.10.0 - 4.10.17, 4.8.0 - 4.8.17, 4.7.0 - 4.7.10, 4.5.0 - 4.5.7, 4.6 rc1 - 4.6.7, 4.3 - 4.3.6, 4.2.0 - 4.2.8, 4.0.1 - 4.0.9, 3.3 - 3.3.8, 3.4 - 3.4.32, 3.5.1 - 3.5.5, 3.9, 3.8

linux_kernel (Debian package): 4.6.4-1 - 4.7.2-1

---

External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e860d2c904d1a9f38a24eb...

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.