Bug 1860348 (CVE-2020-14398) - CVE-2020-14398 libvncserver: an improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c
Summary: CVE-2020-14398 libvncserver: an improperly closed TCP connection causes an in...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-14398
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: 1860349 1860350 1861156 1861157
Blocks: 1860332
TreeView+ depends on / blocked
 
Reported: 2020-07-24 10:57 UTC by Marian Rehak
Modified: 2021-11-02 17:20 UTC (History)
4 users (show)

Fixed In Version: libvncserver 0.9.13
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Last Closed: 2021-11-02 17:20:05 UTC
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Description Marian Rehak 2020-07-24 10:57:16 UTC 
An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.

Upstream commit:

https://github.com/LibVNC/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b
Comment 1 Marian Rehak 2020-07-24 10:57:41 UTC 
Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1860350]
Affects: fedora-all [bug 1860349]
Comment 2 Todd Cullum 2020-07-27 23:26:15 UTC 
Statement:

This flaw does not affect versions of vino shipped with Red Hat Enterprise Linux 6, 7, or 8 because libvncclient is not included in the package.
Comment 3 Todd Cullum 2020-07-27 23:30:02 UTC 
This flaw affects libvncclient, which is shipped with libvncserver. It can be triggered by killing the process, cutting powerful, or another means of ungraceful shutdown causing the TCP connection to be improperly closed.
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