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1.158.  ntp

1.158.1.  RHSA-2009:1039: Important security update

Important

This update has already been released (prior to the GA of this release) as the security errata RHSA-2009:1039
An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 5.
This update has been rated as having important security impact by the Red Hat Security Response Team.
The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source.
A buffer overflow flaw was discovered in the ntpd daemon's NTPv4 authentication code. If ntpd was configured to use public key cryptography for NTP packet authentication, a remote attacker could use this flaw to send a specially-crafted request packet that could crash ntpd. (CVE-2009-1252)

Note

NTP authentication is not enabled by default.
A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially-crafted reply to an ntpq request that could crash ntpq. (CVE-2009-0159)
All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will be restarted automatically.

1.158.2.  RHSA-2009:0046: Moderate security update

Important

This update has already been released (prior to the GA of this release) as the security errata RHSA-2009:0046
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.
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.

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