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RedHat: RHSA-2021:0186-01 Critical: Vulnerability in NTP Exploit Risk

red hat
Calendar Grey January 29, 2009
Dist Redhat Esm H88
Enhancements to the ntp software for CentOS mitigate moderate threats related to time sync vulnerabilities and possible exploitations.
Updated ntp packages to correct a security issue are 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.
A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021)
Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled.
All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.

Topics%20covered

Topics Covered

security advisory security issue Red Hat update moderate impact ntp time spoofing

References

https://www.cve.org/CVERecord?id=CVE-2009-0021 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_7.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_7.1.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.ia64.rpm
ppc: ntp-4.2.0.a.20040617-8.el4_7.1.ppc.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.ppc.rpm
s390: ntp-4.2.0.a.20040617-8.el4_7.1.s390.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.s390.rpm
s390x: ntp-4.2.0.a.20040617-8.el4_7.1.s390x.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.s390x.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_7.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.i386.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386: ntp-4.2.0.a.20040617-8.el4_7.1.i386.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.i386.rpm
ia64: ntp-4.2.0.a.20040617-8.el4_7.1.ia64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.ia64.rpm
x86_64: ntp-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm ntp-debuginfo-4.2.0.a.20040617-8.el4_7.1.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2009:0046-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:0046.html
Issue date: 2009-01-29

Topic

Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Topics%20covered

Topics Covered

security advisory security issue Red Hat update moderate impact ntp time spoofing

Relevant Releases Architectures

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

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

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

Bugs Fixed

476807 - CVE-2009-0021 ntp incorrectly checks for malformed signatures

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