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Bug 1438701 - (CVE-2017-7395) CVE-2017-7395 tigervnc: Integer overflow in SMsgReader::readClientCutText
CVE-2017-7395 tigervnc: Integer overflow in SMsgReader::readClientCutText
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=20170327,repor...
: Security
Depends On: 1438704 1438742
Blocks: 1415638 1438705
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Reported: 2017-04-04 04:48 EDT by Andrej Nemec
Modified: 2017-08-01 16:51 EDT (History)
4 users (show)

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Doc Text:
An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service.
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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 04:48:32 EDT 
In TigerVNC (SMsgReader.cxx SMsgReader::readClientCutText), an authenticated client can crash the server by causing an integer overflow.

Upstream patch:

https://github.com/TigerVNC/tigervnc/pull/436/commits/bf3bdac082978ca32895a4b6a123016094905689
Comment 1 Andrej Nemec 2017-04-04 04:54:40 EDT 
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1438704]
Comment 3 errata-xmlrpc 2017-08-01 16:51:56 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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