Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libvncserver | Aug 30, 2017 | Dec 31, 2016 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 31, 2016 |
| Debian | — | Upgrade libvncserverUpgrade veyon | Jan 6, 2017 | Dec 31, 2016 |
| Freebsd | — | Upgrade libvncserver | Jan 10, 2017 | Jan 9, 2017 |
| Gentoo Linux | — | Upgrade net-libs/libvncserver. | Oct 30, 2017 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp1 | — | Upgrade libvncserver | Nov 30, 2017 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp2 | — | Upgrade libvncserver | Feb 22, 2021 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp3 | — | Upgrade libvncserver | Jan 20, 2021 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp5 | — | Upgrade libvncserver | Feb 3, 2021 | Dec 31, 2016 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 14, 2016 |
| Suse | — | Upgrade LibVNCServer-develUpgrade libvncclient0Upgrade LibVNCServerUpgrade tigervncUpgrade xorg-x11-XvncUpgrade libXvnc1Upgrade libvncserver0 | Jan 12, 2017 | Dec 31, 2016 |
| Ubuntu | — | Upgrade libvncserver0Upgrade italc-masterUpgrade libvncclient1Upgrade libvncserver1Upgrade libitalccoreUpgrade italc-client | Jan 12, 2017 | Dec 31, 2016 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub