1. EXECUTIVE SUMMARY
- CVSS v4 8.7
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: ABB
- Equipment: MV Drives
- Vulnerabilities: Improper Restriction of Operations within the Bounds of a Memory Buffer, Improper Input Validation, Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to gain full access to the drive or cause a denial-of-service condition.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
ABB reports that the following MV Drives are affected by CODESYS RTS (Runtime System) vulnerabilities:
- ACS6080: LAAAA 2.10.0 to LAAAB 5.06.1
- ACS5000: LAAAB 4.03.0 to LAAAB 5.06.1
- ACS6000: LAAAA 2.10.0 to LAAAB 5.06.1
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119
The CODESYS Control runtime system does not restrict the memory access. An improper restriction of operations within the bounds of a memory buffer allows an attacker with access to the drive with user privileges to gain full access of the drive.
CVE-2022-4046 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2022-4046. A base score of 8.7 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/
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