CVE-2018-20748

CRITICAL

Libvncserver < 0.9.12 - Out-of-Bounds Write

Title source: rule
STIX 2.1

Description

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.

References (12)

Core 12
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/LibVNC/libvncserver/issues/273
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3877-1/
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2018/12/10/8
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4547-1/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4587-1/
Patch, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Scores

CVSS v3 9.8
EPSS 0.1057
EPSS Percentile 93.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (12)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 18.10
debian/debian_linux 8.0
libvnc_project/libvncserver < 0.9.12
siemens/simatic_itc1500_firmware 3.0.0.0 - 3.2.1.0
siemens/simatic_itc1500_pro_firmware 3.0.0.0 - 3.2.1.0
siemens/simatic_itc1900_firmware 3.0.0.0 - 3.2.1.0
siemens/simatic_itc1900_pro_firmware 3.0.0.0 - 3.2.1.0
... and 2 more
Published Jan 30, 2019
Tracked Since Feb 18, 2026