CVE Catalog

CVE-2000-1237

Medium
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
1.21%

67th percentile - higher than 67% of all known CVEs

Summary

The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier for remote attackers to determine valid usernames and conduct brute force password guessing.

Risk Assessment

An attacker can enumerate valid usernames and then perform a dictionary or brute force attack to guess passwords, potentially leading to unauthorized access to email accounts.

Recommendation

Update FTGate to a version that does not reveal differences in responses for invalid usernames, or implement rate limiting and account lockout mechanisms.

Related vulnerabilities

Original NVD description (English source)

The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier for remote attackers to determine valid usernames and conduct brute force password guessing.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS