Bug 1438701 (CVE-2017-7395)

Summary: CVE-2017-7395 tigervnc: Integer overflow in SMsgReader::readClientCutText
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bphinz, jgrulich, slawomir, twaugh
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
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.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 03:09:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1438704, 1438742    
Bug Blocks: 1415638, 1438705    

Description Andrej Nemec 2017-04-04 08:48:32 UTC
In TigerVNC (SMsgReader.cxx SMsgReader::readClientCutText), an authenticated client can crash the server by causing an integer overflow.

Upstream patch:


Comment 1 Andrej Nemec 2017-04-04 08:54:40 UTC
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1438704]

Comment 3 errata-xmlrpc 2017-08-01 20:51:56 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