The remote Debian host is missing a security-related update.
Markus Krell discovered that xymon, a network- and applications-monitoring system, was vulnerable to the following security issues : - CVE-2016-2054 The incorrect handling of user-supplied input in the 'config' command can trigger a stack-based buffer overflow, resulting in denial of service (via application crash) or remote code execution. - CVE-2016-2055 The incorrect handling of user-supplied input in the 'config' command can lead to an information leak by serving sensitive configuration files to a remote user. - CVE-2016-2056 The commands handling password management do not properly validate user-supplied input, and are thus vulnerable to shell command injection by a remote user. - CVE-2016-2057 Incorrect permissions on an internal queuing system allow a user with a local account on the xymon master server to bypass all network-based access control lists, and thus inject messages directly into xymon. - CVE-2016-2058 Incorrect escaping of user-supplied input in status webpages can be used to trigger reflected cross-site scripting attacks.
Upgrade the xymon packages. For the stable distribution (jessie), these problems have been fixed in version 4.3.17-6+deb8u1.