CVE-2018-21247

HIGH

LibVNCServer < 0.9.13 - Information Disclosure via Uninitialized Memory in ConnectToRFBRepeater

Title source: llm
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.

References (8)

Core 8
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/LibVNC/libvncserver/issues/253
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
Patch, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Scores

CVSS v3 7.5
EPSS 0.0236
EPSS Percentile 81.5%
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