high
7.5
CWE
119 120
Advisory Published
Updated

CVE-2019-20839: Buffer Overflow

First published: Wed Jun 17 2020(Updated: )

Last updated 24 July 2024

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/libvncserver
0.9.13+dfsg-2+deb11u1
0.9.14+dfsg-1
libvncserver<=0.9.12
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Ubuntu=20.04
Debian Linux=8.0
Debian Linux=9.0
All of
Siemens Simatic ITC1500>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC1500 Firmware
All of
Siemens Simatic ITC1500 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1500 Pro
All of
Siemens Simatic ITC1900 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1900 Firmware
All of
Siemens Simatic ITC1900 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1900 Pro Firmware
All of
Siemens SIMATIC ITC2200 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC2200 Firmware
All of
Siemens Simatic ITC2200 Pro>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC2200 Pro Firmware
SUSE Linux=15.2
Siemens Simatic ITC1500>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC1500 Firmware
Siemens Simatic ITC1500 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1500 Pro
Siemens Simatic ITC1900 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1900 Firmware
Siemens Simatic ITC1900 Pro>=3.0.0.0<3.2.1.0
Siemens Simatic ITC1900 Pro Firmware
Siemens SIMATIC ITC2200 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC2200 Firmware
Siemens Simatic ITC2200 Pro>=3.0.0.0<3.2.1.0
Siemens SIMATIC ITC2200 Pro Firmware

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Remedy

https://github.com/LibVNC/libvncserver/commit/3fd03977c9b35800d73a865f167338cb4d05b0c1

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-20839?

    CVE-2019-20839 is a vulnerability in LibVNCServer that allows a buffer overflow via a long socket filename.

  • How severe is CVE-2019-20839?

    CVE-2019-20839 has a severity score of 7.5 (high).

  • Which software versions are affected by CVE-2019-20839?

    The affected software versions of CVE-2019-20839 are: libvncserver 0.9.11+dfsg-1.3+deb10u4, 0.9.11+dfsg-1.3+deb10u5, 0.9.13+dfsg-2+deb11u1, and 0.9.14+dfsg-1 (from Debian) and libvncserver 0.9.11+dfsg-1ubuntu1.3 (from Ubuntu).

  • How can I fix CVE-2019-20839?

    To fix CVE-2019-20839, update to libvncserver version 0.9.13+dfsg-2+deb11u1 (from Debian) or libvncserver version 0.9.11+dfsg-1ubuntu1.3 (from Ubuntu).

  • Where can I find more information about CVE-2019-20839?

    You can find more information about CVE-2019-20839 at the following references: [GitHub](https://github.com/LibVNC/libvncserver/commit/3fd03977c9b35800d73a865f167338cb4d05b0c1), [GitHub](https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13), [Debian LTS](https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html).

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