Bug 729382 (CVE-2011-2748, CVE-2011-2749)

Summary: CVE-2011-2748 CVE-2011-2749 dhcp: denial of service flaws
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jpopelka, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-04-17 11:20:00 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 729850, 729879, 729880, 729881, 729883, 729885    
Bug Blocks: 729388    
Attachments:
Description Flags
upstream 3.1-ESV-R1 -> 3.1-ESV-R3 patch
none
patch for dhcp-3.0.5 (RHEL-5)
none
patch for dhcp-4.1.1-P1 (RHEL-6)
none
Patch for dhcp-3.0.1 (RHEL-4) none

Description Vincent Danen 2011-08-09 18:00:50 UTC 
Two flaws were found that could be used to cause the ISC DHCP server to halt when processing certain packets [1]. These could be used by an attacker to cause a denial of service for DHCP services.

These flaws are corrected in upstream versions 3.1-ESV-R3, 4.1-ESV-R3 and 4.2.2.

[1] http://www.isc.org/software/dhcp/advisories/cve-2011-2748
Comment 2 Vincent Danen 2011-08-10 17:11:42 UTC 
This is now public.
Comment 3 Vincent Danen 2011-08-10 17:20:27 UTC 
Created attachment 517663 [details]
upstream 3.1-ESV-R1 -> 3.1-ESV-R3 patch

Extracted patch from diffing R1 to R3 and removing all the extraneous copyright/CVS Id/non-code changes, so it should fix both flaws in 3.x versions of dhcp.
Comment 4 Jiri Popelka 2011-08-10 17:41:04 UTC 
Created attachment 517665 [details]
patch for dhcp-3.0.5 (RHEL-5)

(In reply to comment #3)
> Created attachment 517663 [details]
> upstream 3.1-ESV-R1 -> 3.1-ESV-R3 patch

Backported to 3.0.5 (RHEL-5)
Comment 5 Jiri Popelka 2011-08-10 18:15:27 UTC 
Created attachment 517670 [details]
patch for dhcp-4.1.1-P1 (RHEL-6)

From diffing dhcp-4.1-ESV-R3b1 and dhcp-4.1-ESV-R3.
Comment 7 Huzaifa S. Sidhpurwala 2011-08-11 03:06:09 UTC 
Created dhcp tracking bugs for this issue

Affects: fedora-all [bug 729850]
Comment 8 Huzaifa S. Sidhpurwala 2011-08-11 03:07:03 UTC 
Created dhcp tracking bugs for this issue

Affects: fedora-all [bug 729850]
Comment 9 Jiri Popelka 2011-08-11 06:36:32 UTC 
Created attachment 517740 [details]
Patch for dhcp-3.0.1 (RHEL-4)
Comment 11 errata-xmlrpc 2011-08-15 17:38:45 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 4

Via RHSA-2011:1160 https://rhn.redhat.com/errata/RHSA-2011-1160.html