SB2020033101 - Ubuntu update for BlueZ

Description

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0556)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to improper access control in subsystem for BlueZ. A remote attacker on the local network can gain elevated privileges on the target system and cause a denial of service (DoS) condition.

2) Code Injection (CVE-ID: CVE-2016-7837)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

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

The vulnerability allows an attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the parse_line() function used in some userland utilities. A remote attacker with physical proximity to the system can send a specially crafted data to the application and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00352.html
• https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=8514068150759c1d6a46d4605d2351babfde1601
• https://jvn.jp/en/jp/JVN38755305/index.html