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TI-2017-14070 Aliases CVE-2017-18922GHSA-hq8f-cpqj-qph2

It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly…

Priority MEDIUM 46CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.02259 83rd percentileScored 2026-11-07
Fix Fixed Red Hat: 4 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 21

CPEVersionsRoleVendor
cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:*before 0.9.12VulnerableLibvncserver Project
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*19.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*20.04VulnerableCanonical
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*15.2VulnerableopenSUSE
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
  • cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:* Versions before 0.9.12 Vulnerable ·Libvncserver Project
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
Show 11 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:siemens:simatic_itc1500:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
cpe:2.3:h:siemens:simatic_itc1500_pro:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
cpe:2.3:h:siemens:simatic_itc1900:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
cpe:2.3:h:siemens:simatic_itc1900_pro:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
cpe:2.3:h:siemens:simatic_itc2200:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:*3.0.0.0 to before 3.2.1.0VulnerableSiemens
cpe:2.3:h:siemens:simatic_itc2200_pro:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:h:siemens:simatic_itc1500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_itc1500_pro:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_itc1900:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_itc1900_pro:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_itc2200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:* Versions 3.0.0.0 to before 3.2.1.0 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_itc2200_pro:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

Red Hat 4 advisories

  • RHSA-2020:3588 Released 2020-09-01 · Red Hat rating Important
    libvncserver security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) libvncserver-0.9.11-9.el8_0.3
  • RHSA-2020:3456 Released 2020-08-17 · Red Hat rating Important
    libvncserver security update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) libvncserver-0.9.11-9.el8_1.3, libvncserver-devel-0.9.11-9.el8_1.3
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) libvncserver-0.9.11-9.el8_1.3
  • RHSA-2020:3385 Released 2020-08-10 · Red Hat rating Important
    libvncserver security update
    • Red Hat CodeReady Linux Builder (v. 8) libvncserver-0.9.11-15.el8_2.1, libvncserver-devel-0.9.11-15.el8_2.1
    • Red Hat Enterprise Linux AppStream (v. 8) libvncserver-0.9.11-15.el8_2.1
Show 1 more Red Hat advisories
  • RHSA-2020:3281 Released 2020-08-03 · Red Hat rating Important
    libvncserver security update
    • Red Hat Enterprise Linux Client (v. 7) libvncserver-0.9.9-14.el7_8.1
    • Red Hat Enterprise Linux Client Optional (v. 7) libvncserver-devel-0.9.9-14.el7_8.1
    • Red Hat Enterprise Linux Server (v. 7) libvncserver-0.9.9-14.el7_8.1
    • Red Hat Enterprise Linux Server Optional (v. 7) libvncserver-devel-0.9.9-14.el7_8.1
    • Red Hat Enterprise Linux Workstation (v. 7) libvncserver-0.9.9-14.el7_8.1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libvncserver-devel-0.9.9-14.el7_8.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2020:3385
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2020:3456
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:3385
Red Hat Enterprise Linux AppStream E4S (v. 8.0)Fixed RHSA-2020:3588
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2020:3456
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:3281
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:3281
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:3281
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:3281
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:3281
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:3281
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-18922
  2. 2026-10-03 Alias added: GHSA-hq8f-cpqj-qph2

References

Patch 3

Advisory 10

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences