Input validation error in RTU500 CMU - CVE-2021-35533
Published: December 3, 2021
Vulnerability identifier: #VU58504
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-35533
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the APDU parser of the BCI IEC 60870-5-104 function. A remote attacker can send a specially crafted message and perform a denial of service (DoS) attack.
Affected software
RTU500 CMU
How to mitigate CVE-2021-35533
Install updates from vendor's website.
RTU500 CMU - update to 12.6.5.0