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Vulnerability Details : CVE-2019-20839

libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.
Publish Date : 2020-06-17 Last Update Date : 2022-03-10
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Overflow
CWE ID 120

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:1811: libvncserver security update (Moderate) oval:com.redhat.rhsa:def:20211811 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2019-20839

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
5 OS Canonical Ubuntu Linux 18.10 * * * Version Details Vulnerabilities
6 OS Canonical Ubuntu Linux 20.04 * * * Version Details Vulnerabilities
7 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
8 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
9 Application Libvnc Project Libvncserver * * * * Version Details Vulnerabilities
10 OS Opensuse Leap 15.2 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 6
Debian Debian Linux 2
Libvnc Project Libvncserver 1
Opensuse Leap 1

- References For CVE-2019-20839

https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html
MLIST [debian-lts-announce] 20200828 [SECURITY] [DLA 2347-1] libvncserver security update
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13
https://lists.debian.org/debian-lts-announce/2020/06/msg00035.html
MLIST [debian-lts-announce] 20200630 [SECURITY] [DLA 2264-1] libvncserver security update
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
SUSE openSUSE-SU-2020:1025
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
SUSE openSUSE-SU-2020:1056
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf CONFIRM
https://lists.fedoraproject.org/archives/list/[email protected]/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/
FEDORA FEDORA-2020-1a4b1c8271
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
SUSE openSUSE-SU-2020:0988
https://lists.fedoraproject.org/archives/list/[email protected]/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/
FEDORA FEDORA-2020-37112ac660
https://github.com/LibVNC/libvncserver/commit/3fd03977c9b35800d73a865f167338cb4d05b0c1
https://usn.ubuntu.com/4434-1/
UBUNTU USN-4434-1

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2019-20839

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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