CVE-2020-25708
Fixed in a distro release EPSS 2%
A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.
Products: libvncserver_project libvncserver, redhat enterprise_linux, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 8 | libvncserver | 0.9.11-17.el8 |
| AlmaLinux 8 | libvncserver-devel | 0.9.11-17.el8 |
| Debian 10 | libvncserver | 0.9.11+dfsg-1.3+deb10u5 |
| Debian 12 | libvncserver | 0.9.13+dfsg-1 |
| Debian 13 | libvncserver | 0.9.13+dfsg-1 |
| Debian 14 | libvncserver | 0.9.13+dfsg-1 |
| Debian 9 | libvncserver | 0.9.11+dfsg-1.3~deb9u6 |
| Red Hat Enterprise Linux 8 | libvncserver | 0:0.9.11-17.el8 |
| Red Hat Enterprise Linux 8 | libvncserver-debuginfo | 0:0.9.11-17.el8 |
| Red Hat Enterprise Linux 8 | libvncserver-debugsource | 0:0.9.11-17.el8 |
| Red Hat Enterprise Linux 8 | libvncserver-devel | 0:0.9.11-17.el8 |
| Rocky Linux 8 | libvncserver | 0:0.9.11-17.el8 |
| SUSE Enterprise Storage 5 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE HPE Helion OpenStack 8 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP1 | LibVNCServer | 0.9.10-4.25.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP2 | LibVNCServer | 0.9.10-4.25.1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | LibVNCServer | 0.9.1-160.22.1 |
| SUSE Linux Enterprise Server 11 SP4-LTSS | LibVNCServer | 0.9.1-160.22.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server 12 SP5 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP1 | LibVNCServer | 0.9.10-4.25.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | LibVNCServer | 0.9.10-4.25.1 |
| SUSE OpenStack Cloud 7 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE OpenStack Cloud 8 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE OpenStack Cloud 9 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE OpenStack Cloud Crowbar 8 | LibVNCServer | 0.9.9-17.34.1 |
| SUSE OpenStack Cloud Crowbar 9 | LibVNCServer | 0.9.9-17.34.1 |
| Ubuntu 14.04 LTS | x11vnc | no fix |
| Ubuntu 16.04 LTS | italc | no fix |
| Ubuntu 16.04 LTS | libvncserver | 0.9.10+dfsg-3ubuntu0.16.04.6 |
| Ubuntu 16.04 LTS | tightvnc | no fix |
| Ubuntu 16.04 LTS | vino | 3.8.1-0ubuntu9.4 |
| Ubuntu 18.04 LTS | italc | no fix |
| Ubuntu 18.04 LTS | libvncserver | 0.9.11+dfsg-1ubuntu1.4 |
| Ubuntu 18.04 LTS | tightvnc | no fix |
| Ubuntu 18.04 LTS | vino | 3.22.0-3ubuntu1.2 |
| Ubuntu 20.04 LTS | libvncserver | 0.9.12+dfsg-9ubuntu0.3 |
| Ubuntu 20.04 LTS | tightvnc | no fix |
| Ubuntu 20.04 LTS | veyon | no fix |
| Ubuntu 20.04 LTS | vino | 3.22.0-5ubuntu2.2 |
| Ubuntu 22.04 LTS | tightvnc | no fix |
| Ubuntu 22.04 LTS | veyon | no fix |
| Ubuntu 22.04 LTS | vino | 3.22.0-6ubuntu3 |
| Ubuntu 24.04 LTS | tightvnc | no fix |
| Ubuntu 24.04 LTS | veyon | no fix |
| Ubuntu 24.04 LTS | vino | 3.22.0-6ubuntu3 |
| Ubuntu 25.10 | tightvnc | no fix |
| Ubuntu 25.10 | veyon | no fix |
| Ubuntu 26.04 LTS | tightvnc | no fix |
| Ubuntu 26.04 LTS | veyon | no fix |
| Ubuntu 26.10 | tightvnc | no fix |
| Ubuntu 26.10 | veyon | no fix |
| Ubuntu Pro 14.04 LTS | tightvnc | no fix |
| openSUSE Leap 15.1 | LibVNCServer | 0.9.10-lp151.7.12.1 |
| openSUSE Leap 15.2 | LibVNCServer | 0.9.10-lp152.9.8.1 |