Ubuntu update for Linux firmware

1) Man-in-the-middle attack

EUVDB-ID: #VU13985

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5383

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to conduct man-in-the-middle attack on the target system.

The weakness exists in the Bluetooth Low Energy (BLE) implementation of Secure Connections mode insufficient validation of elliptic curve parameters that are used to generate public keys during a Diffie-Hellman key exchange when the affected software performs device pairing operations. An adjacent attacker can intercept the public key exchange between the two targeted systems, inject a malicious public key to aid in determining the session key,  access sensitive information or forge and modify messages, which could be used to inject malicious software on the targeted system. 

Mitigation

Update the affected packages.

Ubuntu 18.04 LTS

linux-firmware - 1.173.18

Ubuntu 16.04 LTS

linux-firmware - 1.157.23

Vulnerable software versions

linux-firmware (Ubuntu package): 1.157.1 - 1.173.17

External links

http://usn.ubuntu.com/4351-1/

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.