Bug 1438703 (CVE-2017-7396) - CVE-2017-7396 tigervnc: SecurityServer and ClientServer memory leaks
Summary: CVE-2017-7396 tigervnc: SecurityServer and ClientServer memory leaks
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-7396
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1438704
Blocks: 1415638 1438705
TreeView+ depends on / blocked
 
Reported: 2017-04-04 08:50 UTC by Andrej Nemec
Modified: 2021-10-21 11:52 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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.
Clone Of:
Environment:
Last Closed: 2021-10-21 11:52:21 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2000 0 normal SHIPPED_LIVE Moderate: tigervnc and fltk security, bug fix, and enhancement update 2017-08-01 18:33:08 UTC

Description Andrej Nemec 2017-04-04 08:50:24 UTC 
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 08:54:49 UTC 
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1438704]
Comment 3 errata-xmlrpc 2017-08-01 20:52:02 UTC 
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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