The remote Debian host is missing a security-related update.
Several vulnerabilities were discovered in the ntp package, an implementation of the Network Time Protocol. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2014-9750 Stephen Roettger of the Google Security Team, Sebastian Krahmer of the SUSE Security Team and Harlan Stenn of Network Time Foundation discovered that the length value in extension fields is not properly validated in several code paths in ntp_crypto.c, which could lead to information leakage or denial of service (ntpd crash). - CVE-2014-9751 Stephen Roettger of the Google Security Team reported that ACLs based on IPv6 ::1 addresses can be bypassed.
Upgrade the ntp packages. For the stable distribution (wheezy), these problems have been fixed in version 1:4.2.6.p5+dfsg-2+deb7u2.