CVE-2018-20748

CVSS V2 High 7.5 CVSS V3 Critical 9.8

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.

Overview

CVE ID
CVE-2018-20748

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-01-30T18:29:00

Last Modified Date
2022-03-09T21:54:44

Weakness Enumerations

CWE	URL
CWE-787	http://cwe.mitre.org/data/definitions/787.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:a:libvnc_project:libvncserver::::::::	1	OR		0.9.12
		AND
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
		AND
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*	1	OR
		AND
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
		AND
cpe:2.3:o:siemens:simatic_itc1500_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc1500:-:::::::*	0	OR
		AND
cpe:2.3:o:siemens:simatic_itc1500_pro_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc1500_pro:-:::::::*	0	OR
		AND
cpe:2.3:o:siemens:simatic_itc1900_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc1900:-:::::::*	0	OR
		AND
cpe:2.3:o:siemens:simatic_itc1900_pro_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc1900_pro:-:::::::*	0	OR
		AND
cpe:2.3:o:siemens:simatic_itc2200_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc2200:-:::::::*	0	OR
		AND
cpe:2.3:o:siemens:simatic_itc2200_pro_firmware::::::::	1	OR	3.0.0.0	3.2.1.0
cpe:2.3:h:siemens:simatic_itc2200_pro:-:::::::*	0	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
7.5

Severity
HIGH

Exploitability Score
10

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
9.8

Base Severity
CRITICAL

Exploitability Score
3.9

Impact Score
5.9

References

Reference URL	Reference Tags
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/e34bcbb759ca5bef85809967a268fdf214c1ad2c	Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a	Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb889f6ba7	Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266b42bae	Patch Third Party Advisory
https://usn.ubuntu.com/3877-1/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/4547-1/	Third Party Advisory
https://usn.ubuntu.com/4587-1/	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf	Patch Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2018-20748
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20748

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 15:46:39				Added to TrackCVE
2022-12-03 16:59:25	2019-01-30T18:29Z	2019-01-30T18:29:00	CVE Published Date	updated
2022-12-03 16:59:25		2022-03-09T21:54:44	CVE Modified Date	updated
2022-12-03 16:59:25		Analyzed	Vulnerability Status	updated