Ubuntu update for libmodbus

Published: 2021-12-06

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-14462 CVE-2019-14463
CWE-ID	CWE-125
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system libmodbus5 (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU20025

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-14462

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information or perform denial of service attack.

The vulnerability exists due to a boundary condition within MODBUS_FC_WRITE_MULTIPLE_COILS in libmodbus. A local user can submit specially crafted input to the affected aplication, trigger out-of-bounds read error and read contents of memory on the system or perform denial of service attack.

Mitigation

Update the affected package libmodbus to the latest version.

Vulnerable software versions

Ubuntu: 18.04

libmodbus5 (Ubuntu package): before 3.0.6-2+deb9u1build0.18.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5173-1

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.

2) Out-of-bounds read

EUVDB-ID: #VU20026