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Vulnerability details: VCID-vjz6-kw2t-cucm
Vulnerability ID VCID-vjz6-kw2t-cucm
Aliases CVE-2019-15681
Summary LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-655 Insufficient Psychological Acceptability
CWE-665 Improper Initialization
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-15681.json
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
epss 0.03337 https://api.first.org/data/v1/epss?cve=CVE-2019-15681
cvssv3 4.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2019-15681
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-15681
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00073.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-15681.json
https://api.first.org/data/v1/epss?cve=CVE-2019-15681
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15681
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a
https://lists.debian.org/debian-lts-announce/2019/10/msg00039.html
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
1854761 https://bugzilla.redhat.com/show_bug.cgi?id=1854761
943793 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=943793
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-2019-15681 https://nvd.nist.gov/vuln/detail/CVE-2019-15681
USN-4407-1 https://usn.ubuntu.com/4407-1/
USN-4547-1 https://usn.ubuntu.com/4547-1/
USN-4573-1 https://usn.ubuntu.com/4573-1/
USN-4587-1 https://usn.ubuntu.com/4587-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-15681.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:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L 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:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-15681
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:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-15681
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 0.86809
EPSS Score 0.03337
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:35:19.289970+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/4573-1/ 37.0.0