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Category:   Application (Generic)  >   ntp Vendors:   ntp.org
(CentOS Issues Fix) ntp Multiple Flaws Let Remote Users Deny Service, View Files, and Bypass Authentication to Modify the Time
SecurityTracker Alert ID:  1033960
SecurityTracker URL:  http://securitytracker.com/id/1033960
CVE Reference:   CVE-2015-7704   (Links to External Site)
Date:  Oct 26 2015
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.2.8p4
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.

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.

Solution:   CentOS has issued a fix for CVE-2015-7704.

i386:
3cd9b3811298e411dfa65eb67a74b61bdee315640dfc11d1f02c28c8953af6aa ntp-4.2.6p5-5.el6.centos.2.i686.rpm
bda06af5dda320b811acf25e26950eec6476b9e2ed91cf40f32b95d8432f1780 ntpdate-4.2.6p5-5.el6.centos.2.i686.rpm
5a68ef2c168fc52f5064d75124fda27a2e0b4992242f0458ffe0207fb6164019 ntp-doc-4.2.6p5-5.el6.centos.2.noarch.rpm
74aa10fbcafbeab0d5e5fe57d7d5ac9177a175f7133eb6d84e7663796eedf700 ntp-perl-4.2.6p5-5.el6.centos.2.i686.rpm

x86_64:
24982d48079999e8be273feeda4725067c9bf74ae335aa4a18d67a7300435ffa ntp-4.2.6p5-5.el6.centos.2.x86_64.rpm
5228dc4b5af2f98f18198928fc4354484154ee1f01cc3a96d1732ed018d7bcbf ntpdate-4.2.6p5-5.el6.centos.2.x86_64.rpm
5a68ef2c168fc52f5064d75124fda27a2e0b4992242f0458ffe0207fb6164019 ntp-doc-4.2.6p5-5.el6.centos.2.noarch.rpm
ad4b6c9ca483d3e31687b730d7772df73b728a2de04c7152d470394203d48ec5 ntp-perl-4.2.6p5-5.el6.centos.2.x86_64.rpm

Source:
d32ee87acc861f4c4adeff99b7f8cdca4407173739d50b60fb3a691147fcbb32 ntp-4.2.6p5-5.el6.centos.2.src.rpm

x86_64:
8f073bb7d81834cf898ba2a8561962cbc16c881b6c2738e25e487da29f00abfe ntp-4.2.6p5-19.el7.centos.3.x86_64.rpm
c8cfd910fd3a75503f31b2f923d419eb1e56b37cd6f565d512cc5c45ed06f50c ntpdate-4.2.6p5-19.el7.centos.3.x86_64.rpm
d640161a23a1bbcfd5186be2b6cad1fcf03003a165b32717bd208ceefc943d92 ntp-doc-4.2.6p5-19.el7.centos.3.noarch.rpm
d4926c9306439e023b3d5d9bfd2d38077971ac0030b0a05ec3fdc3d4ded92071 ntp-perl-4.2.6p5-19.el7.centos.3.noarch.rpm
fbfe6b88e16c8f1bab9ca194d2b234652d016c995330a5aa22cd4f39349f9de2 sntp-4.2.6p5-19.el7.centos.3.x86_64.rpm

Source:
3f2c2f3b1af0b94d01702d85e55442fb517e8747779a40339be96747650246ac ntp-4.2.6p5-19.el7.centos.3.src.rpm

Cause:   Access control error, Boundary error, Input validation error
Underlying OS:  Linux (CentOS)
Underlying OS Comments:  6, 7

Message History:   This archive entry is a follow-up to the message listed below.
Oct 23 2015 ntp Multiple Flaws Let Remote Users Deny Service, View Files, and Bypass Authentication to Modify the Time



 Source Message Contents

Subject:  [CentOS-announce] CESA-2015:1930 Important CentOS 7 ntp Security Update


CentOS Errata and Security Advisory 2015:1930 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2015-1930.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( sha256sum Filename ) 

x86_64:
8f073bb7d81834cf898ba2a8561962cbc16c881b6c2738e25e487da29f00abfe  ntp-4.2.6p5-19.el7.centos.3.x86_64.rpm
c8cfd910fd3a75503f31b2f923d419eb1e56b37cd6f565d512cc5c45ed06f50c  ntpdate-4.2.6p5-19.el7.centos.3.x86_64.rpm
d640161a23a1bbcfd5186be2b6cad1fcf03003a165b32717bd208ceefc943d92  ntp-doc-4.2.6p5-19.el7.centos.3.noarch.rpm
d4926c9306439e023b3d5d9bfd2d38077971ac0030b0a05ec3fdc3d4ded92071  ntp-perl-4.2.6p5-19.el7.centos.3.noarch.rpm
fbfe6b88e16c8f1bab9ca194d2b234652d016c995330a5aa22cd4f39349f9de2  sntp-4.2.6p5-19.el7.centos.3.x86_64.rpm

Source:
3f2c2f3b1af0b94d01702d85e55442fb517e8747779a40339be96747650246ac  ntp-4.2.6p5-19.el7.centos.3.src.rpm



-- 
Johnny Hughes
CentOS Project { http://www.centos.org/ }
irc: hughesjr, #centos@irc.freenode.net
Twitter: @JohnnyCentOS

_______________________________________________
CentOS-announce mailing list
CentOS-announce@centos.org
https://lists.centos.org/mailman/listinfo/centos-announce
 
 


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