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Category:   Application (Generic)  >   Dhcp Vendors:   ISC (Internet Software Consortium)
ISC DHCP OMAPI Connection Management Flaw Lets Remote Users Consume Excessive Socket Descriptors on the Target System
SecurityTracker Alert ID:  1040194
SecurityTracker URL:  http://securitytracker.com/id/1040194
CVE Reference:   CVE-2017-3144   (Links to External Site)
Date:  Jan 16 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.1.0 to 4.1-ESV-R15, 4.2.0 to 4.2.8, 4.3.0 to 4.3.6
Description:   A vulnerability was reported in ISC DHCP. A remote user can consume excessive socket descriptors on the target system.

The system does not properly clean up closed OMAPI connections. A remote user can consume all available socket descriptors for the target DHCP service, preventing new connections and potentially blocking existing connections to the OMAPI service.

Systems that provide remote access to the OMAPI control port are affected.

Impact:   A remote user can consume excessive socket descriptors on the target system.
Solution:   The vendor has developed a patch, available upon request.

The patch will be included in a future maintenance release.

The vendor advisory is available at:

https://kb.isc.org/article/AA-01541/0/CVE-2017-3144

Vendor URL:  kb.isc.org/article/AA-01541/0/CVE-2017-3144 (Links to External Site)
Cause:   Resource error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 2 2018 (Ubuntu Issues Fix) ISC DHCP OMAPI Connection Management Flaw Lets Remote Users Consume Excessive Socket Descriptors on the Target System
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 17.10.



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