vino: A divide by zero issue was found to occur in libvncserver-0.9.12
CVE-2020-25708 is fixed in 6 products on 1 platform, first by libvncclient1 0.9.11+dfsg-1ubuntu1.4, released November 12, 2020. It is not reported as exploited. Patch Radar priority: High.
A divide by zero issue was found to occur in libvncserver-0.9.12. Amalicious client could use this flaw to send a specially crafted messagethat, when processed by the VNC server, would lead to a floating pointexception, resulting in a denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libvncclient1 · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.4 | libvncclient1 0.9.11+dfsg-1ubuntu1.4 | Nov 12, 2020 |
| libvncclient1 · Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.3 | libvncclient1 0.9.12+dfsg-9ubuntu0.3 | Nov 12, 2020 |
| libvncserver · RHEL 8 | 0:0.9.11-17.el8 | RHSA-2021:1811 | May 18, 2021 |
| libvncserver · ol 8 | 0:0.9.11-17.el8 | ELSA-2021-1811 | May 25, 2021 |
| libvncserver-config · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.4 | libvncserver-config 0.9.11+dfsg-1ubuntu1.4 | Nov 12, 2020 |
| libvncserver-devel · RHEL 8 | 0:0.9.11-17.el8 | RHSA-2021:1811 | May 18, 2021 |
| libvncserver-devel · ol 8 | 0:0.9.11-17.el8 | ELSA-2021-1811 | May 25, 2021 |
| libvncserver1 · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.4 | libvncserver1 0.9.11+dfsg-1ubuntu1.4 | Nov 12, 2020 |
| libvncserver1 · Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.3 | libvncserver1 0.9.12+dfsg-9ubuntu0.3 | Nov 12, 2020 |
| vino · Ubuntu 18.04.6 LTS (bionic) | 3.22.0-3ubuntu1.2 | vino 3.22.0-3ubuntu1.2 | Nov 12, 2020 |
| vino · Ubuntu 20.04 LTS (focal) | 3.22.0-5ubuntu2.2 | vino 3.22.0-5ubuntu2.2 | Nov 12, 2020 |
| vino · Ubuntu 22.04.1 LTS (jammy) | 3.22.0-6ubuntu3 | vino 3.22.0-6ubuntu3 | Nov 12, 2020 |
| vino · Ubuntu 24.04.5 LTS (noble) | 3.22.0-6ubuntu3 | vino 3.22.0-6ubuntu3 | Nov 12, 2020 |
| vino · Ubuntu 24.10 (oracular) | 3.22.0-6ubuntu3 | vino 3.22.0-6ubuntu3 | Jan 16, 2026 |
| vino · Ubuntu 25.04 (plucky) | 3.22.0-6ubuntu3 | vino 3.22.0-6ubuntu3 | Jan 16, 2026 |
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