Bug 1739422 (CVE-2019-14513)

Summary: CVE-2019-14513 dnsmasq: Improper bounds checking leads to a buffer overread
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: code, dbecker, dougsland, itamar, jima, jjoyce, jschluet, kbasil, laine, lhh, lpeer, mburns, p, pemensik, sclewis, slinaber, thozza, veillard
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: dnsmasq 2.76 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-08-12 14:47:43 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:    
Bug Blocks: 1739423    

Description Marian Rehak 2019-08-09 09:50:20 UTC 
Improper bounds checking in Dnsmasq before 2.76 allows an attacker controlled DNS server to send large DNS packets that result in a read operation beyond the buffer allocated for the packet, a different vulnerability than CVE-2017-14491.

Upstream Issue:

https://github.com/Slovejoy/dnsmasq-pre2.76
Comment 2 Stefan Cornelius 2019-08-12 12:50:09 UTC 
This commit fixes the problem for me:
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=d3a8b39c7df2f0debf3b5f274a1c37a9e261f94e
Comment 5 Product Security DevOps Team 2019-08-12 14:47:43 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-14513
Comment 7 Summer Long 2019-08-12 22:40:23 UTC 
Statement:

This issue does not affect the versions of dnsmasq as shipped with Red Hat Enterprise Linux 5, 6, 7, and 8.

In Red Hat OpenStack Platform, which currently supports Red Hat Enterprise Linux 7.7, the dnsmasq package is pulled directly from the rhel-7-server-rpms channel. Red Hat OpenStack Platform is therefore unaffected, but please ensure that the underlying Red Hat Enterprise Linux dnsmasq package is current.