CVE-2018-21247

CVSS V2 Medium 5 CVSS V3 High 7.5

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.

Overview

CVE ID
CVE-2018-21247

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2020-06-17T16:15:11

Last Modified Date
2022-03-10T15:29:55

Weakness Enumerations

CWE	URL
CWE-909	http://cwe.mitre.org/data/definitions/909.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:canonical:ubuntu_linux:14.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::	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
cpe:2.3:o:debian:debian_linux:9.0:::::::*	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
		AND
cpe:2.3:o:opensuse:leap:15.2:::::::*	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13	Patch Third Party Advisory
https://github.com/LibVNC/libvncserver/issues/253	Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html	Mailing List 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-2018-21247
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-21247

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 15:46:28				Added to TrackCVE
2022-12-04 18:11:50	2020-06-17T16:15Z	2020-06-17T16:15:11	CVE Published Date	updated
2022-12-04 18:11:50		2022-03-10T15:29:55	CVE Modified Date	updated
2022-12-04 18:11:50		Analyzed	Vulnerability Status	updated