Keep Track of the Latest Vulnerabilities
with SecurityTracker!
    Home    |    View Topics    |    Search    |    Contact Us    |   


Sign Up
Sign Up for Your FREE Weekly SecurityTracker E-mail Alert Summary
Instant Alerts
Buy our Premium Vulnerability Notification Service to receive customized, instant alerts
Put SecurityTracker Vulnerability Alerts on Your Web Site -- It's Free!
Become a Partner and License Our Database or Notification Service
Report a Bug
Report a vulnerability that you have found to SecurityTracker

Category:   Application (Generic)  >   Dhcp Vendors:   ISC (Internet Software Consortium)
ISC DHCP Regular Expressions Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1026393
SecurityTracker URL:
CVE Reference:   CVE-2011-4539   (Links to External Site)
Date:  Dec 8 2011
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.0.x, 4.1-ESV, 4.2.x
Description:   A vulnerability was reported in ISC DHCP. A remote user can cause denial of service conditions.

A remote user can send specially crafted DHCP Request packets to cause the target service to crash. DHCP servers configured to evaluate expressions using a regular expression (i.e., using the "~=" or "~~" comparison operators) may be affected.

BlueCat Networks reported this vulnerability.

Impact:   A remote user can cause the target service to crash.
Solution:   The vendor has issued a fix (4.1-ESV-R4, 4.2.3-P1).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Not specified
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 14 2011 (Red Hat Issues Fix) ISC DHCP Regular Expressions Bug Lets Remote Users Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 6.

 Source Message Contents

[Original Message Not Available for Viewing]

Go to the Top of This SecurityTracker Archive Page

Home   |    View Topics   |    Search   |    Contact Us

Copyright 2017, LLC