Bug 1829870 (CVE-2019-20788) - CVE-2019-20788 libvncserver: integer overflow and heap-based buffer overflow in libvncclient/cursor.c in HandleCursorShape function
Summary: CVE-2019-20788 libvncserver: integer overflow and heap-based buffer overflow ...
Status: CLOSED DUPLICATE of bug 1811948
Alias: CVE-2019-20788
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1829871 1829872
Blocks: 1829873
TreeView+ depends on / blocked
Reported: 2020-04-30 13:55 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 20:10 UTC (History)
4 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in libvncserver in versions through 0.9.12. A large height or width value may cause an integer overflow or a heap-based buffer overflow. The highest threat from this vulnerability is to system availability.
Clone Of:
Last Closed: 2020-05-12 13:49:41 UTC

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Description Guilherme de Almeida Suckevicz 2020-04-30 13:55:28 UTC
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.

Reference and upstream commit:

Comment 1 Guilherme de Almeida Suckevicz 2020-04-30 13:55:48 UTC
Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1829872]
Affects: fedora-all [bug 1829871]

Comment 2 Stefan Cornelius 2020-05-12 13:49:41 UTC

*** This bug has been marked as a duplicate of bug 1811948 ***

Comment 3 Doran Moppert 2020-06-17 03:17:50 UTC

This flaw was found to be a duplicate of CVE-2019-15690. Please see https://access.redhat.com/security/cve/CVE-2019-15690 for information about affected products and security errata.

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