MGASA-2015-0348

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MGASA-2015-0348

Summary: Updated ntp packages fix security vulnerabilities

Details: Updated ntp packages fix security vulnerability: A flaw was found in the way ntpd processed certain remote configuration packets. An attacker could use a specially crafted package to cause ntpd to crash if the attacker had authenticated access to remote ntpd configuration (CVE-2015-5146). It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands, for example, ntpq -c ":config logconfig a" (CVE-2015-5194). It was found that ntpd exits with a segmentation fault when a statistics type that was not enabled during compilation (e.g. timingstats) is referenced by the statistics or filegen configuration command, for example, ntpq -c ':config statistics timingstats' ntpq -c ':config filegen timingstats' (CVE-2015-5195). It was found that the :config command can be used to set the pidfile and driftfile paths without any restrictions. A remote attacker could use this flaw to overwrite a file on the file system with a file containing the pid of the ntpd process (immediately) or the current estimated drift of the system clock (in hourly intervals). For example, ntpq -c ':config pidfile /tmp/ntp.pid' ntpq -c ':config driftfile /tmp/ntp.drift' (CVE-2015-5196). It was discovered that sntp would hang in an infinite loop when a crafted NTP packet was received, related to the conversion of the precision value in the packet to double (CVE-2015-5219).

References: https://advisories.mageia.org/MGASA-2015-0348.html, https://bugs.mageia.org/show_bug.cgi?id=16322, http://support.ntp.org/bin/view/Main/SecurityNotice#June_2015_NTP_Security_Vulnerabi, http://openwall.com/lists/oss-security/2015/08/25/3