exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Red Hat Security Advisory 2021-1811-01

Red Hat Security Advisory 2021-1811-01
Posted May 19, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1811-01 - LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Issues addressed include buffer overflow, denial of service, information leakage, and null pointer vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2018-21247, CVE-2019-20839, CVE-2020-14397, CVE-2020-14405, CVE-2020-25708
SHA-256 | 989c7c7a8b862491fda2080a22ef46eea64cdd2291abf9a2c70ec3dde79b59f1

Red Hat Security Advisory 2021-1811-01

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

====================================================================
Red Hat Security Advisory

Synopsis: Moderate: libvncserver security update
Advisory ID: RHSA-2021:1811-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1811
Issue date: 2021-05-18
CVE Names: CVE-2018-21247 CVE-2019-20839 CVE-2020-14397
CVE-2020-14405 CVE-2020-25708
====================================================================
1. Summary:

An update for libvncserver is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

3. Description:

LibVNCServer is a C library that enables you to implement VNC server
functionality into own programs.

Security Fix(es):

* libvncserver: uninitialized memory contents are vulnerable to Information
Leak (CVE-2018-21247)

* libvncserver: buffer overflow in ConnectClientToUnixSock()
(CVE-2019-20839)

* libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference
(CVE-2020-14397)

* libvncserver: libvncclient/rfbproto.c does not limit TextChat size
(CVE-2020-14405)

* libvncserver: libvncserver/rfbserver.c has a divide by zero which could
result in DoS (CVE-2020-25708)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1849877 - CVE-2019-20839 libvncserver: buffer overflow in ConnectClientToUnixSock()
1849886 - CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak
1860325 - CVE-2020-14405 libvncserver: libvncclient/rfbproto.c does not limit TextChat size
1860344 - CVE-2020-14397 libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference
1896739 - CVE-2020-25708 libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
libvncserver-0.9.11-17.el8.src.rpm

aarch64:
libvncserver-0.9.11-17.el8.aarch64.rpm
libvncserver-debuginfo-0.9.11-17.el8.aarch64.rpm
libvncserver-debugsource-0.9.11-17.el8.aarch64.rpm

ppc64le:
libvncserver-0.9.11-17.el8.ppc64le.rpm
libvncserver-debuginfo-0.9.11-17.el8.ppc64le.rpm
libvncserver-debugsource-0.9.11-17.el8.ppc64le.rpm

s390x:
libvncserver-0.9.11-17.el8.s390x.rpm
libvncserver-debuginfo-0.9.11-17.el8.s390x.rpm
libvncserver-debugsource-0.9.11-17.el8.s390x.rpm

x86_64:
libvncserver-0.9.11-17.el8.i686.rpm
libvncserver-0.9.11-17.el8.x86_64.rpm
libvncserver-debuginfo-0.9.11-17.el8.i686.rpm
libvncserver-debuginfo-0.9.11-17.el8.x86_64.rpm
libvncserver-debugsource-0.9.11-17.el8.i686.rpm
libvncserver-debugsource-0.9.11-17.el8.x86_64.rpm

Red Hat CodeReady Linux Builder (v. 8):

aarch64:
libvncserver-debuginfo-0.9.11-17.el8.aarch64.rpm
libvncserver-debugsource-0.9.11-17.el8.aarch64.rpm
libvncserver-devel-0.9.11-17.el8.aarch64.rpm

ppc64le:
libvncserver-debuginfo-0.9.11-17.el8.ppc64le.rpm
libvncserver-debugsource-0.9.11-17.el8.ppc64le.rpm
libvncserver-devel-0.9.11-17.el8.ppc64le.rpm

s390x:
libvncserver-debuginfo-0.9.11-17.el8.s390x.rpm
libvncserver-debugsource-0.9.11-17.el8.s390x.rpm
libvncserver-devel-0.9.11-17.el8.s390x.rpm

x86_64:
libvncserver-debuginfo-0.9.11-17.el8.i686.rpm
libvncserver-debuginfo-0.9.11-17.el8.x86_64.rpm
libvncserver-debugsource-0.9.11-17.el8.i686.rpm
libvncserver-debugsource-0.9.11-17.el8.x86_64.rpm
libvncserver-devel-0.9.11-17.el8.i686.rpm
libvncserver-devel-0.9.11-17.el8.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-21247
https://access.redhat.com/security/cve/CVE-2019-20839
https://access.redhat.com/security/cve/CVE-2020-14397
https://access.redhat.com/security/cve/CVE-2020-14405
https://access.redhat.com/security/cve/CVE-2020-25708
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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uZts
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://listman.redhat.com/mailman/listinfo/rhsa-announce
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close