CVE-2017-18922
Fixed in a distro release EPSS 2%
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.
Products: libvncserver_project libvncserver, canonical ubuntu_linux, opensuse leap, fedoraproject fedora, siemens simatic_itc1500_firmware, siemens simatic_itc1500_pro_firmware, siemens simatic_itc1900_firmware, siemens simatic_itc1900_pro_firmware, siemens simatic_itc2200_firmware, siemens simatic_itc2200_pro_firmware
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 8 | libvncserver-devel | 0.9.11-15.el8_2.1 |
| Debian 12 | libvncserver | 0.9.12+dfsg-3 |
| Debian 13 | libvncserver | 0.9.12+dfsg-3 |
| Debian 14 | libvncserver | 0.9.12+dfsg-3 |
| Red Hat Enterprise Linux 7 | libvncserver | 0:0.9.9-14.el7_8.1 |
| Red Hat Enterprise Linux 7 | libvncserver-debuginfo | 0:0.9.9-14.el7_8.1 |
| Red Hat Enterprise Linux 7 | libvncserver-devel | 0:0.9.9-14.el7_8.1 |
| Red Hat Enterprise Linux 8 | libvncserver | 0:0.9.11-15.el8_2.1 |
| Red Hat Enterprise Linux 8 | libvncserver-debuginfo | 0:0.9.11-15.el8_2.1 |
| Red Hat Enterprise Linux 8 | libvncserver-debugsource | 0:0.9.11-15.el8_2.1 |
| Red Hat Enterprise Linux 8 | libvncserver-devel | 0:0.9.11-15.el8_2.1 |
| Red Hat rhel e4s 8.0 | libvncserver | 0:0.9.11-9.el8_0.3 |
| Red Hat rhel e4s 8.0 | libvncserver-debuginfo | 0:0.9.11-9.el8_0.3 |
| Red Hat rhel e4s 8.0 | libvncserver-debugsource | 0:0.9.11-9.el8_0.3 |
| Red Hat rhel eus 8.1 | libvncserver | 0:0.9.11-9.el8_1.3 |
| Red Hat rhel eus 8.1 | libvncserver-debuginfo | 0:0.9.11-9.el8_1.3 |
| Red Hat rhel eus 8.1 | libvncserver-debugsource | 0:0.9.11-9.el8_1.3 |
| Red Hat rhel eus 8.1 | libvncserver-devel | 0:0.9.11-9.el8_1.3 |
| SUSE Enterprise Storage 5 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE HPE Helion OpenStack 8 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP1 | LibVNCServer | 0.9.10-4.19.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP1 | LibVNCServer | 0.9.10-4.22.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP2 | LibVNCServer | 0.9.10-4.22.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP2 | LibVNCServer | 0.9.10-4.19.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server 12 SP5 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP1 | LibVNCServer | 0.9.10-4.22.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP1 | LibVNCServer | 0.9.10-4.19.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | LibVNCServer | 0.9.10-4.22.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | LibVNCServer | 0.9.10-4.19.1 |
| SUSE OpenStack Cloud 7 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE OpenStack Cloud 8 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE OpenStack Cloud 9 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE OpenStack Cloud Crowbar 8 | LibVNCServer | 0.9.9-17.31.1 |
| SUSE OpenStack Cloud Crowbar 9 | LibVNCServer | 0.9.9-17.31.1 |
| Ubuntu 14.04 LTS | x11vnc | no fix |
| Ubuntu 16.04 LTS | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.4 |
| Ubuntu 18.04 LTS | libvncserver | 0.9.11+dfsg-1ubuntu1.2 |
| Ubuntu 20.04 LTS | libvncserver | 0.9.12+dfsg-9ubuntu0.1 |
| Ubuntu 20.04 LTS | veyon | no fix |
| Ubuntu 22.04 LTS | veyon | no fix |
| Ubuntu 24.04 LTS | veyon | no fix |
| Ubuntu 25.10 | veyon | no fix |
| Ubuntu 26.04 LTS | veyon | no fix |
| Ubuntu 26.10 | veyon | no fix |
| openSUSE Leap 15.1 | LibVNCServer | 0.9.10-lp151.7.6.1 |
| openSUSE Leap 15.1 | LibVNCServer | 0.9.10-lp151.7.9.1 |
| openSUSE Leap 15.2 | LibVNCServer | 0.9.10-lp152.9.8.1 |
| openSUSE Leap 15.2 | LibVNCServer | 0.9.10-lp152.9.4.1 |
| openSUSE Leap 15.2 | LibVNCServer | 0.9.10-lp152.9.4.2 |