CVE catalog
CVE-2017-18922
libvncserver: CVE-2017-18922
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.26% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libvncserver | sid | 0.9.15+dfsg-6 | fixed |
| Debian | libvncserver | forky | 0.9.15+dfsg-6 | fixed |
| Debian | libvncserver | trixie | 0.9.15+dfsg-1+deb13u2 | fixed |
| Debian | libvncserver | bookworm | 0.9.14+dfsg-1+deb12u2 | fixed |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3build1 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.1 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.2 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.3 | vulnerable |
| Ubuntu | libvncserver | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.4 | fixed |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1 | vulnerable |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1ubuntu1.1 | vulnerable |
| Ubuntu | libvncserver | 18.04 | 0.9.11+dfsg-1ubuntu1.2 | fixed |
| Ubuntu | libvncserver | 20.04 | 0.9.11+dfsg-1.3 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-3ubuntu3 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-6 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-7 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-8 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-9 | vulnerable |
| Ubuntu | libvncserver | 20.04 | 0.9.12+dfsg-9ubuntu0.1 | fixed |
| Opensuse | LibVNCServer | leap 15.2 | 0.9.10-lp152.9.4.1 | fixed |
| Opensuse | LibVNCServer | leap 15.1 | 0.9.10-lp151.7.6.1 | fixed |
| Suse | LibVNCServer | linux enterprise module for package hub 15 sp1 | 0.9.10-4.19.1 | fixed |
| Suse | LibVNCServer | linux enterprise module for package hub 15 sp2 | 0.9.10-4.19.1 | fixed |
| Suse | LibVNCServer | linux enterprise workstation extension 15 sp1 | 0.9.10-4.19.1 | fixed |
| Suse | LibVNCServer | linux enterprise workstation extension 15 sp2 | 0.9.10-4.19.1 | fixed |
| Opensuse | LibVNCServer | leap 15.1 | 0.9.10-lp151.7.9.1 | fixed |
| Suse | LibVNCServer | hpe helion openstack 8 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | openstack cloud 7 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | openstack cloud 8 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | openstack cloud 9 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | openstack cloud crowbar 8 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | openstack cloud crowbar 9 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp2 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp3 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp4 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise software development kit 12 sp5 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp2-ltss | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp2-bcl | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp3-ltss | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp3-bcl | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp4-ltss | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp5 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp5 | 0.9.9-17.31.1 | fixed |
| Suse | LibVNCServer | enterprise storage 5 | 0.9.9-17.31.1 | fixed |
| Opensuse | LibVNCServer | leap 15.2 | 0.9.10-lp152.9.8.1 | fixed |
| Suse | LibVNCServer | linux enterprise module for package hub 15 sp1 | 0.9.10-4.22.1 | fixed |
| Suse | LibVNCServer | linux enterprise module for package hub 15 sp2 | 0.9.10-4.22.1 | fixed |
| Suse | LibVNCServer | linux enterprise workstation extension 15 sp1 | 0.9.10-4.22.1 | fixed |
| Suse | LibVNCServer | linux enterprise workstation extension 15 sp2 | 0.9.10-4.22.1 | fixed |
| Opensuse | LibVNCServer | leap 15.2 | 0.9.10-lp152.9.4.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libvncserver | source | sid | 0.9.12+dfsg-3 | not yet assigned | Not reported | Not reported |
| Debian | libvncserver | source | forky | 0.9.12+dfsg-3 | not yet assigned | Not reported | Not reported |
| Debian | libvncserver | source | trixie | 0.9.12+dfsg-3 | not yet assigned | Not reported | Not reported |
| Debian | libvncserver | source | bookworm | 0.9.12+dfsg-3 | not yet assigned | Not reported | Not reported |
| Ubuntu | libvncserver | deb | 16.04 | 0.9.10+dfsg-3ubuntu0.16.04.4 | Not reported | USN-4407-1 | Not reported |
| Ubuntu | libvncserver | deb | 18.04 | 0.9.11+dfsg-1ubuntu1.2 | Not reported | USN-4407-1 | Not reported |
| Ubuntu | libvncserver | deb | 20.04 | 0.9.12+dfsg-9ubuntu0.1 | Not reported | USN-4407-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.2 | 0.9.10-lp152.9.4.1 | Not reported | OPENSUSE-SU-2020:0978-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.1 | 0.9.10-lp151.7.6.1 | Not reported | OPENSUSE-SU-2020:0960-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise module for package hub 15 sp1 | 0.9.10-4.19.1 | Not reported | SUSE-SU-2020:1873-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise module for package hub 15 sp2 | 0.9.10-4.19.1 | Not reported | SUSE-SU-2020:1873-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise workstation extension 15 sp1 | 0.9.10-4.19.1 | Not reported | SUSE-SU-2020:1873-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise workstation extension 15 sp2 | 0.9.10-4.19.1 | Not reported | SUSE-SU-2020:1873-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.1 | 0.9.10-lp151.7.9.1 | Not reported | OPENSUSE-SU-2020:0988-1 | Not reported |
| Suse | LibVNCServer | rpm | hpe helion openstack 8 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud 7 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud 8 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud 9 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud crowbar 8 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud crowbar 9 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp2 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp3 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp4 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise software development kit 12 sp5 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp2-ltss | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp2-bcl | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp3-ltss | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp3-bcl | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp4-ltss | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp5 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp5 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Suse | LibVNCServer | rpm | enterprise storage 5 | 0.9.9-17.31.1 | Not reported | SUSE-SU-2020:2167-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.2 | 0.9.10-lp152.9.8.1 | Not reported | OPENSUSE-SU-2020:1025-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise module for package hub 15 sp1 | 0.9.10-4.22.1 | Not reported | SUSE-SU-2020:1922-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise module for package hub 15 sp2 | 0.9.10-4.22.1 | Not reported | SUSE-SU-2020:1922-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise workstation extension 15 sp1 | 0.9.10-4.22.1 | Not reported | SUSE-SU-2020:1922-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise workstation extension 15 sp2 | 0.9.10-4.22.1 | Not reported | SUSE-SU-2020:1922-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.2 | 0.9.10-lp152.9.4.2 | Not reported | OPENSUSE-SU-2020:1056-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
[Debian 13 (Trixie)]
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.12+dfsg-3dsa · libvncserver · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2020:3588]
- [https://cert-portal.siemens.com/productcert/csaf/ssa-390195.json]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_3281.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2017-18922]
- [https://osv.dev/vulnerability/SUSE-SU-2020:1873-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:1922-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:2167-1]
- [https://osv.dev/vulnerability/USN-4407-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0960-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0978-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0988-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:1025-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:1056-1]
- [https://security-tracker.debian.org/tracker/CVE-2017-18922]
[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]