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Vulnerability details: VCID-jhre-6uje-5kbc
Vulnerability ID VCID-jhre-6uje-5kbc
Aliases CVE-2020-14405
Summary An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-20 Improper Input Validation
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14405.json
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
epss 0.01296 https://api.first.org/data/v1/epss?cve=CVE-2020-14405
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2020-14405
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2020-14405
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14405.json
https://api.first.org/data/v1/epss?cve=CVE-2020-14405
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14405
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/LibVNC/libvncserver/commit/8937203441ee241c4ace85da687b7d6633a12365
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
https://lists.debian.org/debian-lts-announce/2020/08/msg00045.html
1860325 https://bugzilla.redhat.com/show_bug.cgi?id=1860325
cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2020-14405 https://nvd.nist.gov/vuln/detail/CVE-2020-14405
RHSA-2021:1811 https://access.redhat.com/errata/RHSA-2021:1811
USN-4434-1 https://usn.ubuntu.com/4434-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14405.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14405
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14405
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78857
EPSS Score 0.01296
Published At Aug. 8, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:28.273250+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.19/community.json 37.0.0