Multiple vulnerabilities in Hitachi Energy RTU500 series CMU

Published: 2021-12-08

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-36229 CVE-2020-36230
CWE-ID	CWE-843 CWE-617
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	RTU500 CMU Hardware solutions / Firmware
Vendor	ABB

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Type Confusion

EUVDB-ID: #VU50396

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-36229

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a type confusion error in ldap_X509dn2bv when parsing X.509 DN in ad_keystring. A remote attacker can send a specially crafted request to slapd and crash it.

Mitigation

Install update from vendor's website.

Vulnerable software versions

RTU500 CMU: 12.4 - 13.2.1

External links

http://ics-cert.us-cert.gov/advisories/icsa-21-341-01

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Reachable Assertion

EUVDB-ID: #VU50397