CVE-2018-21247

HIGH

Libvncserver < 0.9.12 - Information Disclosure

Title source: rule
STIX 2.1

Description

An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.

Scores

CVSS v3 7.5
EPSS 0.0148
EPSS Percentile 81.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-909
Status published
Products (14)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04 (2 CPE variants)
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 18.10
debian/debian_linux 8.0
debian/debian_linux 9.0
libvnc_project/libvncserver < 0.9.12
opensuse/leap 15.2
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
... and 4 more
Published Jun 17, 2020
Tracked Since Feb 18, 2026