14.53.08 [ GLSA 201001-01 ] NTP: Denial of Service | |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201001-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: NTP: Denial of Service Date: January 03, 2010 Bugs: #290881 ID: 201001-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A Denial of Service condition in ntpd can cause excessive CPU or bandwidth consumption. Background ========== NTP is a set of the Network Time Protocol programs. Affected packages ================= ------------------------------ Package / Vulnerable / Unaffected ------------------------------ 1 net-misc/ntp < 4.2.4_p7-r1 >= 4.2.4_p7-r1 Description =========== Robin Park and Dmitri Vinokurov discovered that ntp_request.c in ntpd does not handle MODE_PRIVATE packets correctly, causing a continuous exchange of MODE_PRIVATE error responses between two NTP daemons or causing high CPU load on a single host. Impact ====== A remote, unauthenticated attacker could send a specially crafted MODE_PRIVATE packet, allowing for a Denial of Service condition (CPU and bandwidth consumption). Workaround ========== There is no known workaround at this time. Resolution ========== All NTP users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.4_p7-r1" References ========== [ 1 ] CVE-2009-3563 http://cve.mitre.org/cgi-bin/ Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/ Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/ | |
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