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Red Hat: RHSA-2023:1563-01 Moderate: httpd Security Vulnerability Alert

red hat
Calendar Grey December 8, 2009
Dist Redhat Esm H88
Essential security enhancement for Ubuntu ntp: address potential denial of service issues and refresh packages swiftly to ensure server protection.
An updated ntp package that fixes a security issue is now available for Red Hat Enterprise Linux 4 and 5. This update has been rated as having moderate security impact by the Red ...

Solution

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at

Summary

The Network Time Protocol (NTP) is used to synchronize a computer's 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.

Topics%20covered

Topics Covered

security advisory moderate red hat enterprise ntp dos issue

References

https://www.cve.org/CVERecord?id=CVE-2009-3563 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_8.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_8.1.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.ia64.rpm
ppc: ntp-4.2.0.a.20040617-8.el4_8.1.ppc.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.ppc.rpm
s390: ntp-4.2.0.a.20040617-8.el4_8.1.s390.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.s390.rpm
s390x: ntp-4.2.0.a.20040617-8.el4_8.1.s390x.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.s390x.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_8.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.i386.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_8.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_8.1.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.ia64.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source:
i386:

Read the Full Advisory


Advisory ID: RHSA-2009:1648-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:1648.html
Issue date: 2009-12-08

Topic

An updated ntp package that fixes a security issue is now available for RedHat Enterprise Linux 4 and 5.This update has been rated as having moderate security impact by the RedHat Security Response Team.

Topics%20covered

Topics Covered

security advisory moderate red hat enterprise ntp dos issue

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Bugs Fixed

531213 - CVE-2009-3563 ntpd: DoS with mode 7 packets (VU#568372)

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