SB2019080908 - Multiple vulnerabilities in libmodbus

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2019-14462)

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.

2) Out-of-bounds read (CVE-ID: CVE-2019-14463)

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_REGISTERS 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.

Remediation

Install update from vendor's website.

References

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