Arbitrary Code Execution via Out-of-Bounds Memory Write in NTP's MX4200 Refclock

CVE-2017-6451 · MEDIUM Severity

AV:L/AC:L/AU:N/C:P/I:P/A:P

The mx4200_send function in the legacy MX4200 refclock in NTP before 4.2.8p10 and 4.3.x before 4.3.94 does not properly handle the return value of the snprintf function, which allows local users to execute arbitrary code via unspecified vectors, which trigger an out-of-bounds memory write.

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