CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:P/A:P
EPSS
Percentile
99.7%
CentOS Errata and Security Advisory CESA-2009:1648
The Network Time Protocol (NTP) is used to synchronize a computerβs time
with a referenced time source.
Robin Park and Dmitri Vinokurov discovered a flaw in the way ntpd handled
certain malformed NTP packets. ntpd logged information about all such
packets and replied with an NTP packet that was treated as malformed when
received by another ntpd. A remote attacker could use this flaw to create
an NTP packet reply loop between two ntpd servers via a malformed packet
with a spoofed source IP address and port, causing ntpd on those servers to
use excessive amounts of CPU time and fill disk space with log messages.
(CVE-2009-3563)
All ntp users are advised to upgrade to this updated package, which
contains a backported patch to resolve this issue. After installing the
update, the ntpd daemon will restart automatically.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2009-December/078518.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078519.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078522.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078523.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078567.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078568.html
Affected packages:
ntp
Upstream details at:
https://access.redhat.com/errata/RHSA-2009:1648
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 4 | i386 | ntp | <Β 4.2.0.a.20040617-8.el4_8.1 | ntp-4.2.0.a.20040617-8.el4_8.1.i386.rpm |
CentOS | 4 | i386 | ntp | <Β 4.2.0.a.20040617-8.el4_8.1 | ntp-4.2.0.a.20040617-8.el4_8.1.i386.rpm |
CentOS | 4 | x86_64 | ntp | <Β 4.2.0.a.20040617-8.el4_8.1 | ntp-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm |
CentOS | 4 | x86_64 | ntp | <Β 4.2.0.a.20040617-8.el4_8.1 | ntp-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm |
CentOS | 4 | i386 | ntp | <Β 4.2.0.a.20040617-8.el4_8.2.centos | ntp-4.2.0.a.20040617-8.el4_8.2.centos.i386.rpm |
CentOS | 4 | i386 | ntp | <Β 4.2.0.a.20040617-8.el4_8.2.centos | ntp-4.2.0.a.20040617-8.el4_8.2.centos.i386.rpm |
CentOS | 4 | x86_64 | ntp | <Β 4.2.0.a.20040617-8.el4_8.2.centos | ntp-4.2.0.a.20040617-8.el4_8.2.centos.x86_64.rpm |
CentOS | 4 | x86_64 | ntp | <Β 4.2.0.a.20040617-8.el4_8.2.centos | ntp-4.2.0.a.20040617-8.el4_8.2.centos.x86_64.rpm |
CentOS | 5 | x86_64 | ntp | <Β 4.2.2p1-9.el5.centos.2.1 | ntp-4.2.2p1-9.el5.centos.2.1.x86_64.rpm |
CentOS | 5 | x86_64 | ntp | <Β 4.2.2p1-9.el5.centos.2.1 | ntp-4.2.2p1-9.el5.centos.2.1.x86_64.rpm |