CVE-2017-18922 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 fra...
CriticalCVSS 9.8
EPSS 2.3%
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/libvncserver(Debian:12) | < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| debian/libvncserver(Debian:13) | < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| debian/libvncserver(Debian:14) | < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| libvncserver project libvncserver | < 0.9.12 | 0.9.12 |
| Canonical Ubuntu Linux | = 16.04 | No fix listed |
| Canonical Ubuntu Linux | = 18.04 | No fix listed |
| Canonical Ubuntu Linux | = 19.10 | No fix listed |
| Canonical Ubuntu Linux | = 20.04 | No fix listed |
| openSUSE leap | = 15.1 | No fix listed |
| openSUSE leap | = 15.2 | No fix listed |
| fedoraproject fedora | = 31 | No fix listed |
| fedoraproject fedora | = 32 | No fix listed |
| Siemens simatic itc1500 firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| Siemens simatic itc1500 pro firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| Siemens simatic itc1900 firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| Siemens simatic itc1900 pro firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| Siemens simatic itc2200 firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| Siemens simatic itc2200 pro firmware | >= 3.0.0.0, < 3.2.1.0 | 3.2.1.0 |
| ubuntu/veyon(Ubuntu:24.04) | All versions | No fix listed |
| ubuntu/veyon(Ubuntu:26.04) | All versions | No fix listed |
| ubuntu/veyon(Ubuntu:26.10) | All versions | No fix listed |
| ubuntu/veyon(Ubuntu:22.04) | All versions | No fix listed |
References
- Ubuntu CVE tracker vendor-advisory
- USN-4407-1 vendor-advisory
- www.cve.org
- Debian Security Tracker CVE-2017-18922 vendor-advisory
- openSUSE-SU-2020:0960 mailing-list third-party-advisory vendor-advisory
- openSUSE-SU-2020:0978 mailing-list third-party-advisory vendor-advisory
- openSUSE-SU-2020:0988 mailing-list third-party-advisory vendor-advisory
- openSUSE-SU-2020:1025 mailing-list third-party-advisory vendor-advisory
- openSUSE-SU-2020:1056 mailing-list third-party-advisory vendor-advisory
- [oss-security] 20200630 Re: libvncserver: old websocket decoding patch mailing-list third-party-advisory
- bugzilla.redhat.com issue-tracking third-party-advisory
- cert-portal.siemens.com patch third-party-advisory
- github.com patch third-party-advisory
- FEDORA-2020-1a4b1c8271 vendor-advisory
- FEDORA-2020-37112ac660 vendor-advisory
- USN-4407-1 patch third-party-advisory vendor-advisory
- www.openwall.com mailing-list third-party-advisory