CVE catalog
CVE-2018-20748
libvncserver: CVE-2018-20748
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.32% · Oct 27, 2026
LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.
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 | veyon | sid | 4.9.7+repack1-1.1 | fixed |
| Debian | veyon | trixie | 4.9.5+repack1-2 | fixed |
| Debian | veyon | bookworm | 4.7.5+repack1-1 | fixed |
| 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 |
| Suse | LibVNCServer | linux enterprise module for package hub 15 | 0.9.10-4.6.1 | fixed |
| Suse | LibVNCServer | linux enterprise workstation extension 15 | 0.9.10-4.6.1 | fixed |
| Opensuse | LibVNCServer | leap 15.0 | 0.9.10-lp150.3.6.1 | fixed |
| Suse | LibVNCServer | linux enterprise software development kit 11 sp4 | 0.9.1-160.9.1 | fixed |
| Suse | LibVNCServer | linux enterprise point of sale 11 sp3 | 0.9.1-160.9.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 11 sp4 | 0.9.1-160.9.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 11 sp4 | 0.9.1-160.9.1 | fixed |
| Suse | LibVNCServer | openstack cloud 7 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp2 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise software development kit 12 sp3 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise software development kit 12 sp4 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12-ltss | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp1-ltss | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp2-ltss | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp2-bcl | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp3 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp3 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server 12 sp4 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp4 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | enterprise storage 4 | 0.9.9-17.11.1 | fixed |
| Suse | LibVNCServer | linux enterprise server for sap applications 12 sp1 | 0.9.9-17.11.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | veyon | source | sid | 4.1.7+repack1-1 | not yet assigned | Not reported | Not reported |
| Debian | veyon | source | trixie | 4.1.7+repack1-1 | not yet assigned | Not reported | Not reported |
| Debian | veyon | source | bookworm | 4.1.7+repack1-1 | not yet assigned | Not reported | Not reported |
| Debian | libvncserver | source | sid | 0.9.11+dfsg-1.3 | not yet assigned | Not reported | [920941] |
| Debian | libvncserver | source | forky | 0.9.11+dfsg-1.3 | not yet assigned | Not reported | [920941] |
| Debian | libvncserver | source | trixie | 0.9.11+dfsg-1.3 | not yet assigned | Not reported | [920941] |
| Debian | libvncserver | source | bookworm | 0.9.11+dfsg-1.3 | not yet assigned | Not reported | [920941] |
| Suse | LibVNCServer | rpm | linux enterprise module for package hub 15 | 0.9.10-4.6.1 | Not reported | SUSE-SU-2019:0283-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise workstation extension 15 | 0.9.10-4.6.1 | Not reported | SUSE-SU-2019:0283-1 | Not reported |
| Opensuse | LibVNCServer | rpm | leap 15.0 | 0.9.10-lp150.3.6.1 | Not reported | OPENSUSE-SU-2019:0196-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise software development kit 11 sp4 | 0.9.1-160.9.1 | Not reported | SUSE-SU-2019:13952-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise point of sale 11 sp3 | 0.9.1-160.9.1 | Not reported | SUSE-SU-2019:13952-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 11 sp4 | 0.9.1-160.9.1 | Not reported | SUSE-SU-2019:13952-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 11 sp4 | 0.9.1-160.9.1 | Not reported | SUSE-SU-2019:13952-1 | Not reported |
| Suse | LibVNCServer | rpm | openstack cloud 7 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp2 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise software development kit 12 sp3 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise software development kit 12 sp4 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12-ltss | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp1-ltss | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp2-ltss | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp2-bcl | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp3 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp3 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server 12 sp4 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp4 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | enterprise storage 4 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-1 | Not reported |
| Suse | LibVNCServer | rpm | linux enterprise server for sap applications 12 sp1 | 0.9.9-17.11.1 | Not reported | SUSE-SU-2019:0313-2 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libveyon-core]Fixed
Source package: [veyon]
Details (2)
4.7.5+repack1-1· amd64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
4.7.5+repack1-1· arm64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.14+dfsg-1+deb12u2· amd64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
0.9.14+dfsg-1+deb12u2· arm64 · bookwormFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · bookworm; dsa · libvncserver · debian · 12
- [veyon-configurator]Fixed
Source package: [veyon]
Details (2)
4.7.5+repack1-1· amd64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
4.7.5+repack1-1· arm64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- [veyon-master]Fixed
Source package: [veyon]
Details (2)
4.7.5+repack1-1· amd64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
4.7.5+repack1-1· arm64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- [veyon-plugins]Fixed
Source package: [veyon]
Details (2)
4.7.5+repack1-1· amd64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
4.7.5+repack1-1· arm64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
- [veyon-service]Fixed
Source package: [veyon]
Details (2)
4.7.5+repack1-1· amd64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
4.7.5+repack1-1· arm64 · bookwormFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · bookworm; dsa · veyon · debian · 12
[Debian 13 (Trixie)]
- [libveyon-core]Fixed
Source package: [veyon]
Details (2)
4.9.5+repack1-2· amd64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
4.9.5+repack1-2· arm64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
- [libvncclient1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
- [libvncserver1]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
- [libvncserver-dev]Fixed
Source package: [libvncserver]
Details (2)
0.9.15+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
0.9.15+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
0.9.11+dfsg-1.3dsa · libvncserver · debian · 13
- [veyon-configurator]Fixed
Source package: [veyon]
Details (2)
4.9.5+repack1-2· amd64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
4.9.5+repack1-2· arm64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
- [veyon-master]Fixed
Source package: [veyon]
Details (2)
4.9.5+repack1-2· amd64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
4.9.5+repack1-2· arm64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
- [veyon-plugins]Fixed
Source package: [veyon]
Details (2)
4.9.5+repack1-2· amd64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
4.9.5+repack1-2· arm64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
- [veyon-service]Fixed
Source package: [veyon]
Details (2)
4.9.5+repack1-2· amd64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
4.9.5+repack1-2· arm64 · trixieFixed · Fixed:
4.1.7+repack1-1dsa · veyon · debian · 13
Observed:
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-390195.json]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2019_0283-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-20748]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0283-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0313-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0313-2]
- [https://osv.dev/vulnerability/SUSE-SU-2019:13952-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2019:0196-1]
- [https://security-tracker.debian.org/tracker/CVE-2018-20748]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20748.json]
[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]