CVE-2016-2563

Critical

Published: 07/04/2016(UTC)Translated: 15/06/2026(UTC)NVD NIST

Summary

A stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY before 0.66.6.3 allows remote servers to cause a denial of service or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.

Risk Assessment

Organizations may be exposed to denial of service or remote code execution, which can lead to serious security implications.

Recommendation

It is recommended to update PuTTY to version 0.67 or KiTTY to version 0.66.6.4 to mitigate this vulnerability.

Original NVD description (English source)

Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.