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Bug 1438703 - (CVE-2017-7396) CVE-2017-7396 tigervnc: SecurityServer and ClientServer memory leaks
CVE-2017-7396 tigervnc: SecurityServer and ClientServer memory leaks
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170327,reported=2...
: Security
Depends On: 1438704
Blocks: 1415638 1438705
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Reported: 2017-04-04 04:50 EDT by Andrej Nemec
Modified: 2018-03-29 18:02 EDT (History)
4 users (show)

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Doc Text:
A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion.
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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-2017:2000 normal SHIPPED_LIVE Moderate: tigervnc and fltk security, bug fix, and enhancement update 2017-08-01 14:33:08 EDT

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Description Andrej Nemec 2017-04-04 04:50:24 EDT 
In TigerVNC (CConnection.cxx CConnection::CConnection), an unauthenticated client can cause a small memory leak in the server. 

Upstream patch:

https://github.com/TigerVNC/tigervnc/pull/436/commits/dccb5f7d776e93863ae10bbff56a45c523c6eeb0
Comment 1 Andrej Nemec 2017-04-04 04:54:49 EDT 
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1438704]
Comment 3 errata-xmlrpc 2017-08-01 16:52:02 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2000 https://access.redhat.com/errata/RHSA-2017:2000
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