CVE-2017-18922
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Libvncserver
PublishedJun 30, 2020
First seenJun 30, 2020
How to fix
Update
- libvncserver_project libvncserver0.9.12 or later
- siemens simatic_itc1500_firmware3.2.1.0 or later
- siemens simatic_itc1500_pro_firmware3.2.1.0 or later
- siemens simatic_itc1900_firmware3.2.1.0 or later
- siemens simatic_itc1900_pro_firmware3.2.1.0 or later
- siemens simatic_itc2200_firmware3.2.1.0 or later
- siemens simatic_itc2200_pro_firmware3.2.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libvncserver_project libvncserver | v < 0.9.12 | 0.9.12 |
| canonical ubuntu_linux | 16.04, 18.04, 19.10, 20.04 | — |
| opensuse leap | 15.1, 15.2 | — |
| fedoraproject fedora | 31, 32 | — |
| siemens simatic_itc1500_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
| siemens simatic_itc1500_pro_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
| siemens simatic_itc1900_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
| siemens simatic_itc1900_pro_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
| siemens simatic_itc2200_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
| siemens simatic_itc2200_pro_firmware | 3.0.0.0 ≤ v < 3.2.1.0 | 3.2.1.0 |
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