Brute-Force Vulnerability in KTM System e-BOK

Executive Summary

The vulnerability in KTM System e-BOK is due to the absence of any limit or timeout on consecutive login attempts. This means an attacker can make unlimited authentication requests without restriction.

Because there is no rate-limiting, attackers can efficiently perform brute-force attacks to guess user passwords.

This vulnerability becomes especially critical when combined with CVE-2026-35097, where passwords are limited to a six-digit numeric format, making brute-force attacks feasible in a short time.

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Detection Guidance

The vulnerability in KTM System e-BOK allows unlimited consecutive login attempts without any rate limiting or timeout. To detect this vulnerability on your system or network, you can monitor authentication logs for repeated failed login attempts from the same IP address or user account in a short period of time.

Commands to help detect such behavior might include searching authentication logs for repeated failures. For example, on a Linux system, you could use:

• grep 'failed login' /var/log/auth.log | awk '{print $1,$2,$3,$11}' | sort | uniq -c | sort -nr
• or to detect rapid repeated login attempts from the same IP:
• grep 'failed login' /var/log/auth.log | awk '{print $11}' | sort | uniq -c | sort -nr

Additionally, network monitoring tools can be configured to alert on high volumes of authentication requests to the e-BOK login endpoint, which may indicate brute-force attempts exploiting the lack of rate limiting.

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Impact Analysis

This vulnerability allows attackers to repeatedly attempt to guess user passwords without any restriction, increasing the risk of unauthorized access to user accounts.

If an attacker successfully brute-forces a password, they can gain access to sensitive information or perform unauthorized actions within the system.

The impact is heightened by the fact that passwords are limited to a six-digit numeric format, making it easier and faster for attackers to compromise accounts.

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Compliance Impact

The vulnerability in KTM System e-BOK allows unlimited authentication attempts due to the lack of rate-limiting, enabling efficient brute-force attacks on user accounts. This can lead to unauthorized access to personal and financial information of tenants or cooperative members.

Such unauthorized access risks violating data protection regulations like GDPR, which require appropriate security measures to protect personal data from unauthorized access and breaches.

Additionally, the weak password policy (six-digit numeric passwords) combined with this vulnerability increases the risk of compromise, further impacting compliance with standards that mandate strong authentication controls.

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Mitigation Strategies

To mitigate this vulnerability, apply the patch published in June 2026 that fixes the issue by implementing limits or timeouts on consecutive login attempts.

Additionally, consider enforcing stronger password policies beyond the six-digit numeric format to reduce the risk of brute-force attacks.

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