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A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.

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在文件访问前对链接解析不恰当(链接跟随)

chrony 后置链接漏洞

chrony 3.5.1之前版本存在安全漏洞，该漏洞可导致数据丢失或拒绝服务。

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