CVE-2018-20019

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
n/a	LibVNC	commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f

References

https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatch, Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-029-libvnc-multiple-heap-out-of-bound-vulnerabilities/Broken Link
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201908-05Third Party Advisory
https://usn.ubuntu.com/3877-1/Third Party Advisory
https://usn.ubuntu.com/4547-1/Third Party Advisory
https://usn.ubuntu.com/4587-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4383Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatch, Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-029-libvnc-multiple-heap-out-of-bound-vulnerabilities/Broken Link
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201908-05Third Party Advisory
https://usn.ubuntu.com/3877-1/Third Party Advisory
https://usn.ubuntu.com/4547-1/Third Party Advisory
https://usn.ubuntu.com/4587-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4383Third Party Advisory

Timeline

Published: Dec 19, 2018
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2018

CVE-2018-200209.8LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client CVE-2018-200217.5LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerabil CVE-2018-200227.5LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC cl CVE-2018-200237.5LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code t CVE-2018-200247.5LibVNC before commit 4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7 contains null pointer dereference in VNC client code that can result DoS.CVE-2018-200257.5Use of Insufficiently Random Values exists in CODESYS V3 products versions prior V3.5.14.0.CVE-2018-200267.5Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.CVE-2018-200279.8The yaml_parse.load method in Pylearn2 allows code injection.CVE-2018-200286.5Contao 3.x before 3.5.37, 4.4.x before 4.4.31 and 4.6.x before 4.6.11 has Incorrect Access Control.CVE-2018-200295.5The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to cause a denial of service (BS CVE-2018-200307.5An error when processing the EXIF_IFD_INTEROPERABILITY and EXIF_IFD_EXIF tags within libexif version 0.6.21 can be exploited to exhaust avai CVE-2018-200317.5A Denial of Service vulnerability related to preemptive item deletion in lmgrd and vendor daemon components of FlexNet Publisher version 11.