Belden Hirschmann HiSecOS Classic Firewall up to 05.3.02/05.3.2 HTTPS Login Interface buffer overflow

Summaryinfo

A vulnerability was found in Belden Hirschmann HiSecOS Classic Firewall up to 05.3.02/05.3.2. It has been rated as critical. This vulnerability affects unknown code of the component HTTPS Login Interface. Performing a manipulation results in buffer overflow. This vulnerability is known as CVE-2018-25237. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Belden Hirschmann HiSecOS Classic Firewall up to 05.3.02/05.3.2. This affects an unknown function of the component HTTPS Login Interface. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Hirschmann HiSecOS devices versions prior to 05.3.03 contain a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled that allows remote attackers to crash the device or execute arbitrary code by submitting a password longer than 128 characters. Attackers can exploit improper bounds checking in password handling to overflow a fixed-size buffer and achieve denial of service or remote code execution.

It is possible to read the advisory at assets.belden.com. This vulnerability is uniquely identified as CVE-2018-25237 since 04/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/04/2026).

Upgrading to version 05.3.03 eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Belden

Name

• Hirschmann HiSecOS Classic Firewall

Version

• 05.3.0
• 05.3.02
• 05.3.1
• 05.3.2

CPE 2.3info

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CPE 2.2info

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