Synopsis: Important: ntp security update Advisory ID: SLSA-2014:2024-1 Issue Date: 2014-12-20 CVE Numbers: CVE-2014-9293 CVE-2014-9294 CVE-2014-9295 CVE-2014-9296 -- Multiple buffer overflow flaws were discovered in ntpd's crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv() flaw requires non- default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit. (CVE-2014-9295) It was found that ntpd automatically generated weak keys for its internal use if no ntpdc request authentication key was specified in the ntp.conf configuration file. A remote attacker able to match the configured IP restrictions could guess the generated key, and possibly use it to send ntpdc query or configuration requests. (CVE-2014-9293) It was found that ntp-keygen used a weak method for generating MD5 keys. This could possibly allow an attacker to guess generated MD5 keys that could then be used to spoof an NTP client or server. Note: it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys). (CVE-2014-9294) A missing return statement in the receive() function could potentially allow a remote attacker to bypass NTP's authentication mechanism. (CVE-2014-9296) After installing the update, the ntpd daemon will restart automatically. -- SL6 x86_64 ntp-4.2.6p5-2.el6_6.x86_64.rpm ntp-debuginfo-4.2.6p5-2.el6_6.x86_64.rpm ntpdate-4.2.6p5-2.el6_6.x86_64.rpm ntp-perl-4.2.6p5-2.el6_6.x86_64.rpm i386 ntp-4.2.6p5-2.el6_6.i686.rpm ntp-debuginfo-4.2.6p5-2.el6_6.i686.rpm ntpdate-4.2.6p5-2.el6_6.i686.rpm ntp-perl-4.2.6p5-2.el6_6.i686.rpm noarch ntp-doc-4.2.6p5-2.el6_6.noarch.rpm SL7 x86_64 ntp-4.2.6p5-19.el7_0.x86_64.rpm ntp-debuginfo-4.2.6p5-19.el7_0.x86_64.rpm ntpdate-4.2.6p5-19.el7_0.x86_64.rpm sntp-4.2.6p5-19.el7_0.x86_64.rpm noarch ntp-doc-4.2.6p5-19.el7_0.noarch.rpm ntp-perl-4.2.6p5-19.el7_0.noarch.rpm - Scientific Linux Development Team