critical
9.8
CWE
119 787
Advisory Published
CVE Published
Updated

CVE-2017-18922: Buffer Overflow

First published: Tue Jun 30 2020(Updated: )

It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Libvncserver Project Libvncserver<0.9.12
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Canonical Ubuntu Linux=20.04
openSUSE Leap=15.1
openSUSE Leap=15.2
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Siemens Simatic Itc1500 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1500
Siemens Simatic Itc1500 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1500 Pro
Siemens Simatic Itc1900 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1900
Siemens Simatic Itc1900 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1900 Pro
Siemens Simatic Itc2200 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc2200
Siemens Simatic Itc2200 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc2200 Pro
All of
Siemens Simatic Itc1500 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1500
All of
Siemens Simatic Itc1500 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1500 Pro
All of
Siemens Simatic Itc1900 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1900
All of
Siemens Simatic Itc1900 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc1900 Pro
All of
Siemens Simatic Itc2200 Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc2200
All of
Siemens Simatic Itc2200 Pro Firmware>=3.0.0.0<3.2.1.0
Siemens Simatic Itc2200 Pro
redhat/libvncserver<0.9.12
0.9.12
debian/libvncserver
0.9.13+dfsg-2+deb11u1
0.9.14+dfsg-1

Remedy

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

Remedy

https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433

Remedy

https://usn.ubuntu.com/4407-1/

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Reference Links

Frequently Asked Questions

  • What is CVE-2017-18922?

    CVE-2017-18922 is a vulnerability in LibVNCServer that allows a malicious attacker to cause a heap-based buffer overflow by sending specially crafted WebSocket frames.

  • How severe is CVE-2017-18922?

    CVE-2017-18922 has a severity rating of 9.8 out of 10, making it a critical vulnerability.

  • Which software versions are affected by CVE-2017-18922?

    The affected software versions for CVE-2017-18922 include LibVNCServer prior to 0.9.12.

  • How can I fix CVE-2017-18922?

    To fix CVE-2017-18922, you should update LibVNCServer to version 0.9.12 or later.

  • Where can I find more information about CVE-2017-18922?

    More information about CVE-2017-18922 can be found on the CVE website at https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18922.

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