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Category:   Application (Generic)  >   Dhcp Vendors:   ISC (Internet Software Consortium)
(CentOS Issues Fix) Dhcp Buffer Overflow in 'dhclient' Lets Remote Servers Cause the Target Client to Crash
SecurityTracker Alert ID:  1040478
SecurityTracker URL:  http://securitytracker.com/id/1040478
CVE Reference:   CVE-2018-5732   (Links to External Site)
Date:  Mar 10 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.1.0 - 4.1-ESV-R15, 4.2.0 - 4.2.8, 4.3.0 - 4.3.6, 4.4.0
Description:   A vulnerability was reported in Dhcp. A remote user can cause the target dhclient to crash.

A remote server can return a specially crafted response to trigger a buffer overflow in the processing of DHCP options and cause the target dhclient to crash.

Felix Wilhelm, Google Security Team, reported this vulnerability.

Impact:   A remote user can cause the target dhclient to crash.
Solution:   CentOS has issued a fix.

i386:
d74b9147c23f2a85d05994e5c97a1cf4238f9160560a3d99afc743235f17e478 dhclient-4.1.1-53.P1.el6.centos.3.i686.rpm
4b6eefd9e0fa8e158eba5354de94eec519cdb56100126ab99e76b4533b20ce7b dhcp-4.1.1-53.P1.el6.centos.3.i686.rpm
41699a2a381d35284bf951babfe642914f50e0a52b46639ea71b3698c316dd9a dhcp-common-4.1.1-53.P1.el6.centos.3.i686.rpm
b14b80d8ce47f85e0f0231fd847e76b0823014aa5e01743bed26340c8268b935 dhcp-devel-4.1.1-53.P1.el6.centos.3.i686.rpm

x86_64:
6c2d892db89a98240aa701e0db2f7bae92a14fbff88c3591346ae00c08dda81d dhclient-4.1.1-53.P1.el6.centos.3.x86_64.rpm
2af186105006dd48b23fc26befcc0864113f3558ffa044c35b1629589bcf0e47 dhcp-4.1.1-53.P1.el6.centos.3.x86_64.rpm
38c76bbcf0ce53b45d10a372cb541e5cdcbeab48a78d5434cbdacdda967f375b dhcp-common-4.1.1-53.P1.el6.centos.3.x86_64.rpm
b14b80d8ce47f85e0f0231fd847e76b0823014aa5e01743bed26340c8268b935 dhcp-devel-4.1.1-53.P1.el6.centos.3.i686.rpm
c42918bc17d58f11ddd8814b5f66ff88954ad7bdad26b6c38c3e8b81866e0c11 dhcp-devel-4.1.1-53.P1.el6.centos.3.x86_64.rpm

Source:
bb099b608850936a55ebd7857618c50278f669ca32818b2d8b6882814fdbe9a5 dhcp-4.1.1-53.P1.el6.centos.3.src.rpm

Cause:   Boundary error
Underlying OS:  Linux (CentOS)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Feb 28 2018 Dhcp Buffer Overflow in 'dhclient' Lets Remote Servers Cause the Target Client to Crash



 Source Message Contents

Subject:  [CentOS-announce] CESA-2018:0469 Important CentOS 6 dhcp Security Update


CentOS Errata and Security Advisory 2018:0469 Important

Upstream details at : https://access.redhat.com/errata/RHSA-2018:0469

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

i386:
d74b9147c23f2a85d05994e5c97a1cf4238f9160560a3d99afc743235f17e478  dhclient-4.1.1-53.P1.el6.centos.3.i686.rpm
4b6eefd9e0fa8e158eba5354de94eec519cdb56100126ab99e76b4533b20ce7b  dhcp-4.1.1-53.P1.el6.centos.3.i686.rpm
41699a2a381d35284bf951babfe642914f50e0a52b46639ea71b3698c316dd9a  dhcp-common-4.1.1-53.P1.el6.centos.3.i686.rpm
b14b80d8ce47f85e0f0231fd847e76b0823014aa5e01743bed26340c8268b935  dhcp-devel-4.1.1-53.P1.el6.centos.3.i686.rpm

x86_64:
6c2d892db89a98240aa701e0db2f7bae92a14fbff88c3591346ae00c08dda81d  dhclient-4.1.1-53.P1.el6.centos.3.x86_64.rpm
2af186105006dd48b23fc26befcc0864113f3558ffa044c35b1629589bcf0e47  dhcp-4.1.1-53.P1.el6.centos.3.x86_64.rpm
38c76bbcf0ce53b45d10a372cb541e5cdcbeab48a78d5434cbdacdda967f375b  dhcp-common-4.1.1-53.P1.el6.centos.3.x86_64.rpm
b14b80d8ce47f85e0f0231fd847e76b0823014aa5e01743bed26340c8268b935  dhcp-devel-4.1.1-53.P1.el6.centos.3.i686.rpm
c42918bc17d58f11ddd8814b5f66ff88954ad7bdad26b6c38c3e8b81866e0c11  dhcp-devel-4.1.1-53.P1.el6.centos.3.x86_64.rpm

Source:
bb099b608850936a55ebd7857618c50278f669ca32818b2d8b6882814fdbe9a5  dhcp-4.1.1-53.P1.el6.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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