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Bug 1522918 - (CVE-2017-3144) CVE-2017-3144 dhcp: omapi code doesn't free socket descriptors when empty message is received allowing denial-of-service
CVE-2017-3144 dhcp: omapi code doesn't free socket descriptors when empty mes...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20171207,repor...
: Security
Depends On: 1519363 1523475 1523547
Blocks: 1522919
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Reported: 2017-12-06 12:52 EST by Adam Mariš
Modified: 2018-07-24 13:32 EDT (History)
7 users (show)

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Doc Text:
It was found that the DHCP daemon did not properly clean up closed OMAPI connections in certain cases. A remote attacker able to connect to the OMAPI port could use this flaw to exhaust file descriptors in the DHCP daemon, leading to a denial of service in the OMAPI functionality.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0158 normal SHIPPED_LIVE Moderate: dhcp security update 2018-01-25 11:19:54 EST

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Description Adam Mariš 2017-12-06 12:52:56 EST 
It was found that omapi code doesn't free socket descriptor if empty message was sent by client, which allows malicious client to use up all available descriptors causing Denial of Service.

Upstream patch:

https://source.isc.org/cgi-bin/gitweb.cgi?p=dhcp.git;a=commit;h=1a6b62fe17a
Comment 5 Dhiru Kholia 2017-12-08 04:42:46 EST 
Created dhcp tracking bugs for this issue:

Affects: fedora-all [bug 1523547]
Comment 7 Dhiru Kholia 2018-01-16 23:57:16 EST 
External References:

https://kb.isc.org/article/AA-01541
Comment 9 errata-xmlrpc 2018-01-25 06:30:43 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0158 https://access.redhat.com/errata/RHSA-2018:0158
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