Bug 1661123 (CVE-2018-20022) - CVE-2018-20022 libvncserver: Improper initialization in VNC client code allows for information disclosure
Summary: CVE-2018-20022 libvncserver: Improper initialization in VNC client code allow...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-20022
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: 1661124 1661125 1662998 1663006
Blocks: 1661105
TreeView+ depends on / blocked
 
Reported: 2018-12-20 07:14 UTC by Sam Fowler
Modified: 2021-10-27 03:19 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2021-10-27 03:19:01 UTC
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Description Sam Fowler 2018-12-20 07:14:26 UTC
LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR.


External Reference:

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/


Upstream Patch:

https://github.com/LibVNC/libvncserver/commit/2f5b2ad1c6c99b1ac6482c95844a84d66bb52838

Comment 1 Sam Fowler 2018-12-20 07:14:39 UTC
Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1661125]
Affects: fedora-all [bug 1661124]


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