Bug 1438701 (CVE-2017-7395) - CVE-2017-7395 tigervnc: Integer overflow in SMsgReader::readClientCutText
Summary: CVE-2017-7395 tigervnc: Integer overflow in SMsgReader::readClientCutText
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-7395
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1438704 1438742
Blocks: 1415638 1438705
TreeView+ depends on / blocked
 
Reported: 2017-04-04 08:48 UTC by Andrej Nemec
Modified: 2019-09-29 14:08 UTC (History)
4 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:09:54 UTC
Embargoed:

Attachments (Terms of Use)


Links
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 08:48:32 UTC 
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 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
Note You need to log in before you can comment on or make changes to this bug.