CVE-2018-20020

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution

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://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/3877-1/	Third Party Advisory
https://www.debian.org/security/2019/dsa-4383	Third Party Advisory
https://security.gentoo.org/glsa/201908-05
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
https://security.gentoo.org/glsa/202006-06
https://usn.ubuntu.com/4547-1/
https://usn.ubuntu.com/4547-2/
https://usn.ubuntu.com/4587-1/

Advertisement

Configurations

Configuration 1 (hide)

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

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::

Information

Published : 2018-12-19 08:29

Updated : 2020-10-23 06:15

NVD link : CVE-2018-20020

Mitre link : CVE-2018-20020

JSON object : View

CWE

CWE-787

Out-of-bounds Write

Advertisement

Products Affected

debian

debian_linux

libvnc_project

libvncserver

canonical

ubuntu_linux

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/", "name": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html", "name": "[debian-lts-announce] 20181227 [SECURITY] [DLA 1617-1] libvncserver security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://usn.ubuntu.com/3877-1/", "name": "USN-3877-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "https://www.debian.org/security/2019/dsa-4383", "name": "DSA-4383", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}, {"url": "https://security.gentoo.org/glsa/201908-05", "name": "GLSA-201908-05", "tags": [], "refsource": "GENTOO"}, {"url": "https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html", "name": "[debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update", "tags": [], "refsource": "MLIST"}, {"url": "https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html", "name": "[debian-lts-announce] 20191129 [SECURITY] [DLA 2016-1] ssvnc security update", "tags": [], "refsource": "MLIST"}, {"url": "https://security.gentoo.org/glsa/202006-06", "name": "GLSA-202006-06", "tags": [], "refsource": "GENTOO"}, {"url": "https://usn.ubuntu.com/4547-1/", "name": "USN-4547-1", "tags": [], "refsource": "UBUNTU"}, {"url": "https://usn.ubuntu.com/4547-2/", "name": "USN-4547-2", "tags": [], "refsource": "UBUNTU"}, {"url": "https://usn.ubuntu.com/4587-1/", "name": "USN-4587-1", "tags": [], "refsource": "UBUNTU"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution"}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-787"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-20020", "ASSIGNER": "vulnerability@kaspersky.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2018-12-19T16:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.9.12"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-10-23T13:15Z"}