(Oracle Issues Fix for Oracle Linux) ntp Multiple Flaws Let Remote Users Deny Service, View Files, and Bypass Authentication to Modify the Time
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SecurityTracker Alert ID: 1033966 |
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SecurityTracker URL: http://securitytracker.com/id/1033966
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CVE Reference:
CVE-2015-7704
(Links to External Site)
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Date: Oct 26 2015
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Impact:
Denial of service via network, Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 4.2.8p4
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Description:
Multiple vulnerabilities were reported in ntp. A remote user can view files on the target system. A remote user can cause denial of service conditions on the target system. A remote user can bypass authentication. A remote user can modify the time on the target system.
A remote user can trigger a memory leak in CRYPTO_ASSOC [CVE-2015-7701].
A remote user can send AutoKey messages with a specially crafted AutoKey data packet length value to cause denial of service conditions [CVE-2015-7691, CVE-2015-7692, CVE-2015-7702].
A remote user can overwrite "pidfile" and "driftfile" configuration file directives [CVE-2015-7703].
A remote user can supply specially crafted data to cause denial of service conditions [CVE-2015-7704, CVE-2015-7705].
A remote user can trigger a mode 7 loop counter integer overflow in ntpd [CVE-2015-7848].
A remote user can trigger a use-after-free memory error in the processing of trusted keys [CVE-2015-7849].
A remote user can exploit a logfile-keyfile configuration flaw to cause denial of service conditions [CVE-2015-7850].
A remote user can exploit a directory traversal flaw in ntpd saveconfig [CVE-2015-7851].
A remote user can trigger a memory corruption error in the ntpq atoascii() function [CVE-2015-7852].
A remote user can supply specially crafted reference clock data to trigger a buffer overflow [CVE-2015-7853].
A remote user can supply a specially crafted password value to trigger a memory corruption error [CVE-2015-7854].
A remote user can send a specially crafted control packet message to exploit a flaw in decodenetnum() to cause denial of service conditions [CVE-2015-7855].
A remote user can exploit a flaw in the crypto-NAK() function to bypass symmetric association authentication [CVE-2015-7871].
Cisco ASIG, IDA, Cisco TALOS, Tenable, RedHat, OpenVMS, and Boston University reported these vulnerabilities.
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Impact:
A remote user can modify time on the target system.
A remote user can view files on the target system.
A remote user can cause denial of service conditions.
A remote user can bypass authentication on the target system.
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Solution:
Oracle has issued a fix for CVE-2015-7704.
The Oracle Linux advisory is available at:
http://linux.oracle.com/errata/ELSA-2015-1930.html
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Vendor URL: linux.oracle.com/errata/ELSA-2015-1930.html (Links to External Site)
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Cause:
Access control error, Boundary error, Input validation error
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Underlying OS: Linux (Oracle)
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Underlying OS Comments: 6, 7
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Subject: [El-errata] ELSA-2015-1930 Important: Oracle Linux 6 ntp security update
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Oracle Linux Security Advisory ELSA-2015-1930
http://linux.oracle.com/errata/ELSA-2015-1930.html
The following updated rpms for Oracle Linux 6 have been uploaded to the
Unbreakable Linux Network:
i386:
ntp-4.2.6p5-5.el6_7.2.i686.rpm
ntp-doc-4.2.6p5-5.el6_7.2.noarch.rpm
ntp-perl-4.2.6p5-5.el6_7.2.i686.rpm
ntpdate-4.2.6p5-5.el6_7.2.i686.rpm
x86_64:
ntp-4.2.6p5-5.el6_7.2.x86_64.rpm
ntp-doc-4.2.6p5-5.el6_7.2.noarch.rpm
ntp-perl-4.2.6p5-5.el6_7.2.x86_64.rpm
ntpdate-4.2.6p5-5.el6_7.2.x86_64.rpm
SRPMS:
http://oss.oracle.com/ol6/SRPMS-updates/ntp-4.2.6p5-5.el6_7.2.src.rpm
Description of changes:
[4.2.6p5-5.el6_7.2]
- check origin timestamp before accepting KoD RATE packet (CVE-2015-7704)
- allow only one step larger than panic threshold with -g (CVE-2015-5300)
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https://oss.oracle.com/mailman/listinfo/el-errata
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