Bug 694170

Summary: dhcp: DoS (excessive CPU use) by opening an OMAPI connection
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: jpopelka, vdanen
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2011-04-21 17:03:24 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
real fix for the issue none

Description Jan Lieskovsky 2011-04-06 16:45:43 UTC 
A security flaw was found in the way DHCP (Dynamic Host Configuration Protocol)
server processed remote connections when the dhcpd was configured to provide
Object Management API (OMAPI) capability. A remote attacker could use this flaw
to cause denial of service (excessive CPU use and dhcpd daemon unreachability).

References:
[1] https://bugzilla.novell.com/show_bug.cgi?id=680298
[2] https://lists.isc.org/pipermail/dhcp-users/2011-February/012780.html
[3] https://lists.isc.org/pipermail/dhcp-users/2011-February/012781.html
[4] https://bugzilla.redhat.com/show_bug.cgi?id=666441
[5] http://www.mentby.com/Group/dhcp-users/omapi-not-working-in-420.html
Comment 8 Jan Lieskovsky 2011-04-08 10:50:40 UTC 
This issue did NOT affect the versions of the dhcp package, as shipped
with Red Hat Enterprise Linux 4, 5, or 6.

--

This issue did NOT affect the version of the dhcp package, as shipped
with Fedora release of 13.
Comment 9 Vincent Danen 2011-04-21 16:58:15 UTC 
This is fixed in Fedora 14 and higher:

* Mon Jan 03 2011 Jiri Popelka <jpopelka> - 12:4.2.0-17.P2
- Fix OMAPI (#666441)
Comment 10 Vincent Danen 2011-04-21 17:03:24 UTC 
Statement:

Not vulnerable. This issue did not affect the versions of dhcp as shipped with Red Hat Enterprise Linux 4, 5, or 6.