Details of VAR-202006-1843

ID

VAR-202006-1843

CVE

CVE-2020-14403

TITLE

LibVNCServer Buffer error vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2020-006688

DESCRIPTION

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings. LibVNCServer Exists in a buffer error vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be put into a state. ========================================================================== Ubuntu Security Notice USN-4573-1 October 07, 2020 vino vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in Vino. Software Description: - vino: VNC server for GNOME Details: Nicolas Ruff discovered that Vino incorrectly handled large ClientCutText messages. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service. (CVE-2014-6053) It was discovered that Vino incorrectly handled certain packet lengths. A remote attacker could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code. (CVE-2018-7225) Pavel Cheremushkin discovered that an information disclosure vulnerability existed in Vino when sending a ServerCutText message. An attacker could possibly use this issue to expose sensitive information. (CVE-2019-15681) It was discovered that Vino incorrectly handled region clipping. A remote attacker could possibly use this issue to cause Vino to crash, resulting in a denial of service. (CVE-2020-14397) It was discovered that Vino incorrectly handled encodings. A remote attacker could use this issue to cause Vino to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-14402, CVE-2020-14403, CVE-2020-14404) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: vino 3.22.0-5ubuntu2.1 Ubuntu 18.04 LTS: vino 3.22.0-3ubuntu1.1 Ubuntu 16.04 LTS: vino 3.8.1-0ubuntu9.3 After a standard system update you need to restart your session to make all the necessary changes. References: https://usn.ubuntu.com/4573-1 CVE-2014-6053, CVE-2018-7225, CVE-2019-15681, CVE-2020-14397, CVE-2020-14402, CVE-2020-14403, CVE-2020-14404 Package Information: https://launchpad.net/ubuntu/+source/vino/3.22.0-5ubuntu2.1 https://launchpad.net/ubuntu/+source/vino/3.22.0-3ubuntu1.1 https://launchpad.net/ubuntu/+source/vino/3.8.1-0ubuntu9.3

Trust: 1.71

sources: NVD: CVE-2020-14403 // JVNDB: JVNDB-2020-006688 // PACKETSTORM: 159499

AFFECTED PRODUCTS

vendor:	siemens	model:	simatic itc2200	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1500 pro	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	siemens	model:	simatic itc2200 pro	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1900 pro	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	siemens	model:	simatic itc2200	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	debian	model:	linux	scope:	eq	version:	9.0	Trust: 1.0
vendor:	canonical	model:	ubuntu linux	scope:	eq	version:	18.04	Trust: 1.0
vendor:	siemens	model:	simatic itc1900	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	canonical	model:	ubuntu linux	scope:	eq	version:	16.04	Trust: 1.0
vendor:	siemens	model:	simatic itc1500	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	canonical	model:	ubuntu linux	scope:	eq	version:	14.04	Trust: 1.0
vendor:	libvnc	model:	libvncserver	scope:	lte	version:	0.9.12	Trust: 1.0
vendor:	siemens	model:	simatic itc2200 pro	scope:	gte	version:	3.0.0.0	Trust: 1.0
vendor:	canonical	model:	ubuntu linux	scope:	eq	version:	20.04	Trust: 1.0
vendor:	canonical	model:	ubuntu linux	scope:	eq	version:	18.10	Trust: 1.0
vendor:	debian	model:	linux	scope:	eq	version:	8.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1900 pro	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1500 pro	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1900	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	siemens	model:	simatic itc1500	scope:	lt	version:	3.2.1.0	Trust: 1.0
vendor:	libvnc	model:	libvncserver	scope:	eq	version:	0.9.13	Trust: 0.8

sources: JVNDB: JVNDB-2020-006688 // NVD: CVE-2020-14403

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-14403
value:	MEDIUM
Trust: 1.0
NVD:	JVNDB-2020-006688
value:	CRITICAL
Trust: 0.8
CNNVD:	CNNVD-202006-1187
value:	MEDIUM
Trust: 0.6

nvd@nist.gov:	CVE-2020-14403
severity:	MEDIUM
baseScore:	5.5
vectorString:	AV:N/AC:L/AU:S/C:P/I:N/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	SINGLE
confidentialityImpact:	PARTIAL
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	8.0
impactScore:	4.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.0
NVD:	JVNDB-2020-006688
severity:	HIGH
baseScore:	7.5
vectorString:	AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	NONE
impactScore:	NONE
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.8

nvd@nist.gov:	CVE-2020-14403
baseSeverity:	MEDIUM
baseScore:	5.4
vectorString:	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	NONE
availabilityImpact:	LOW
exploitabilityScore:	2.8
impactScore:	2.5
version:	3.1
Trust: 1.0
NVD:	JVNDB-2020-006688
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2020-006688 // CNNVD: CNNVD-202006-1187 // NVD: CVE-2020-14403

PROBLEMTYPE DATA

problemtype:	CWE-787	Trust: 1.0
problemtype:	CWE-119	Trust: 0.8

sources: JVNDB: JVNDB-2020-006688 // NVD: CVE-2020-14403

THREAT TYPE

remote

Trust: 0.7

sources: PACKETSTORM: 159499 // CNNVD: CNNVD-202006-1187

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202006-1187

CONFIGURATIONS

sources: JVNDB: JVNDB-2020-006688

PATCH

title:	libvncserver: encodings: prevent OOB accesses	url:	https://github.com/LibVNC/libvncserver/commit/74e8a70f2c9a5248d6718ce443e07c7ed314dfff	Trust: 0.8
title:	Comparing changes	url:	https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13	Trust: 0.8
title:	LibVNCServer Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=125635	Trust: 0.6

sources: JVNDB: JVNDB-2020-006688 // CNNVD: CNNVD-202006-1187

EXTERNAL IDS

db:	NVD	id:	CVE-2020-14403	Trust: 2.5
db:	SIEMENS	id:	SSA-390195	Trust: 1.6
db:	JVNDB	id:	JVNDB-2020-006688	Trust: 0.8
db:	PACKETSTORM	id:	159499	Trust: 0.7
db:	AUSCERT	id:	ESB-2020.2248	Trust: 0.6
db:	AUSCERT	id:	ESB-2020.2535	Trust: 0.6
db:	AUSCERT	id:	ESB-2020.2727	Trust: 0.6
db:	AUSCERT	id:	ESB-2020.3465	Trust: 0.6
db:	AUSCERT	id:	ESB-2020.2972	Trust: 0.6
db:	NSFOCUS	id:	48915	Trust: 0.6
db:	CS-HELP	id:	SB2021121649	Trust: 0.6
db:	CNNVD	id:	CNNVD-202006-1187	Trust: 0.6

sources: JVNDB: JVNDB-2020-006688 // PACKETSTORM: 159499 // CNNVD: CNNVD-202006-1187 // NVD: CVE-2020-14403

REFERENCES

url:	https://github.com/libvnc/libvncserver/compare/libvncserver-0.9.12...libvncserver-0.9.13	Trust: 1.6
url:	https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html	Trust: 1.6
url:	https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html	Trust: 1.6
url:	https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf	Trust: 1.6
url:	https://usn.ubuntu.com/4434-1/	Trust: 1.6
url:	https://usn.ubuntu.com/4573-1/	Trust: 1.6
url:	https://github.com/libvnc/libvncserver/commit/74e8a70f2c9a5248d6718ce443e07c7ed314dfff	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2020-14403	Trust: 1.5
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2020-14403	Trust: 0.8
url:	https://www.auscert.org.au/bulletins/esb-2020.2248/	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2020.2535/	Trust: 0.6
url:	https://vigilance.fr/vulnerability/libvncserver-multiple-vulnerabilities-32651	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2020.2727/	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2020.3465/	Trust: 0.6
url:	http://www.nsfocus.net/vulndb/48915	Trust: 0.6
url:	https://www.cybersecurity-help.cz/vdb/sb2021121649	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2020.2972/	Trust: 0.6
url:	https://packetstormsecurity.com/files/159499/ubuntu-security-notice-usn-4573-1.html	Trust: 0.6
url:	https://launchpad.net/ubuntu/+source/vino/3.8.1-0ubuntu9.3	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2020-14404	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2020-14402	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2019-15681	Trust: 0.1
url:	https://launchpad.net/ubuntu/+source/vino/3.22.0-5ubuntu2.1	Trust: 0.1
url:	https://launchpad.net/ubuntu/+source/vino/3.22.0-3ubuntu1.1	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2020-14397	Trust: 0.1
url:	https://usn.ubuntu.com/4573-1	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2014-6053	Trust: 0.1
url:	https://nvd.nist.gov/vuln/detail/cve-2018-7225	Trust: 0.1

sources: JVNDB: JVNDB-2020-006688 // PACKETSTORM: 159499 // CNNVD: CNNVD-202006-1187 // NVD: CVE-2020-14403

CREDITS

Ubuntu

Trust: 0.7

sources: PACKETSTORM: 159499 // CNNVD: CNNVD-202006-1187

SOURCES

db:	JVNDB	id:	JVNDB-2020-006688
db:	PACKETSTORM	id:	159499
db:	CNNVD	id:	CNNVD-202006-1187
db:	NVD	id:	CVE-2020-14403

LAST UPDATE DATE

2024-11-23T20:33:32.315000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2020-006688	date:	2020-07-15T00:00:00
db:	CNNVD	id:	CNNVD-202006-1187	date:	2022-03-10T00:00:00
db:	NVD	id:	CVE-2020-14403	date:	2024-11-21T05:03:11.660

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2020-006688	date:	2020-07-15T00:00:00
db:	PACKETSTORM	id:	159499	date:	2020-10-07T16:06:41
db:	CNNVD	id:	CNNVD-202006-1187	date:	2020-06-17T00:00:00
db:	NVD	id:	CVE-2020-14403	date:	2020-06-17T16:15:12.213