Multiple vulnerabilities in libmodbus

Published: 2019-08-09

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 Subscribe	libmodbus Universal components / Libraries / Libraries used by multiple products
Vendor	libmodbus.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU20025

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

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

Install updates from vendor's website.

Vulnerable software versions

libmodbus: 3.0.0 - 3.1.4

CPE2.3

External links

http://github.com/stephane/libmodbus/commit/5ccdf5ef79d742640355d1132fa9e2abc7fbaefc
http://libmodbus.org/2019/stable-and-development-releases/

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