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Category:   Application (Generic)  >   Dhcp Vendors:   ISC (Internet Software Consortium)
(Ubuntu Issues Fix) Dhcp Buffer Overflow in 'dhclient' Lets Remote Servers Cause the Target Client to Crash
SecurityTracker Alert ID:  1040986
SecurityTracker URL:  http://securitytracker.com/id/1040986
CVE Reference:   CVE-2018-5732   (Links to External Site)
Date:  May 29 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:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3586-2

Vendor URL:  usn.ubuntu.com/usn/usn-3586-2 (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 ESM

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



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