CVE-2015-3405
HighSummary
The ntp-keygen program in versions 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines, which may allow remote attackers to obtain the value of generated MD5 keys via a brute force attack.
Risk Assessment
Insufficient entropy of MD5 keys poses a risk that attackers can easily crack the keys, potentially leading to system compromise or access to sensitive data.
Recommendation
It is recommended to upgrade to ntp version 4.2.8p2-RC2 or 4.3.12 to ensure adequate entropy of MD5 keys and minimize the risk of attacks.
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Original NVD description (English source)
ntp-keygen in ntp 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

