CVE-2018-20749

LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.openwall.com/lists/oss-security/2018/12/10/8	Exploit Mailing List Third Party Advisory
https://github.com/LibVNC/libvncserver/issues/273	Issue Tracking Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707	Patch Third Party Advisory
https://usn.ubuntu.com/3877-1/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html	Third Party Advisory
http://www.securityfocus.com/bid/106825	Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://usn.ubuntu.com/4547-1/
https://usn.ubuntu.com/4587-1/
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Configurations

Configuration 1 (hide)

cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::

Information

Published : 2019-01-30 18:29

Updated : 2021-12-14 14:15

NVD link : CVE-2018-20749

Mitre link : CVE-2018-20749

JSON object : View

Products Affected

canonical

ubuntu_linux

debian

debian_linux

libvnc_project

libvncserver

CWE

CWE-787

Out-of-bounds Write

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