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Overview

Id RHSA-2014:2025-01
Name Red Hat 2014:2025-01 RHSA Important: ntp security update for RHEL 5 x86_64
Vendor Name red_hat
Product None
Content Type Critical Critical
Language(s)
Operating System(s) Linux 
Released On 20 Dec 2014 12:00:00

RHSA-2014:2025-01

Red Hat 2014:2025-01 RHSA Important: ntp security update for RHEL 5 x86_64

Vendor Name

red_hat

Product

None

Released On

20 Dec 2014 12:00:00

Url

https://rhn.redhat.com/errata/RHSA-2014-2025.html

Description

LSAC(v2)
The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. Multiple buffer overflow flaws were discovered in ntpd's crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv() flaw requires non-default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit. (CVE-2014-9295) It was found that ntpd automatically generated weak keys for its internal use if no ntpdc request authentication key was specified in the ntp.conf configuration file. A remote attacker able to match the configured IP restrictions could guess the generated key, and possibly use it to send ntpdc query or configuration requests. (CVE-2014-9293) It was found that ntp-keygen used a weak method for generating MD5 keys. This could possibly allow an attacker to guess generated MD5 keys that could then be used to spoof an NTP client or server. Note: it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys). (CVE-2014-9294) 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 restart automatically.

Related Resources

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Superseded Patches


Last Updated: 27 May 2016 11:20:28