Out-of-bounds read in Modicon M340 and Modicon M580 - CVE-2018-7845
Published: October 3, 2019
Vulnerability identifier: #VU21497
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2018-7845
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Schneider Electric
Affected software:
Modicon M340
Modicon M580
Modicon M340
Modicon M580
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when reading specific memory blocks in the controller over Modbus. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.
How to mitigate CVE-2018-7845
Install updates from vendor's website.