CVE-2019-20840

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
An issue was discovered in LibVNCServer before 0.9.13. libvncserver/ws_decode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.
Overview
  • CVE ID
  • CVE-2019-20840
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-06-17T16:15:11
  • Last Modified Date
  • 2022-03-10T15:23:29
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:* 1 OR 0.9.12
AND
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* 1 OR
AND
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
AND
cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc1500:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc1500_pro:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc1900:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc1900_pro:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc2200:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:* 1 OR 3.0.0.0 3.2.1.0
cpe:2.3:h:siemens:simatic_itc2200_pro:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13 Release Notes Third Party Advisory
https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/ Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html Mailing List Third Party Advisory
https://usn.ubuntu.com/4434-1/ Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-20840
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20840
History
Created Old Value New Value Data Type Notes
2022-05-10 15:46:29 Added to TrackCVE
2022-12-04 18:11:58 2020-06-17T16:15Z 2020-06-17T16:15:11 CVE Published Date updated
2022-12-04 18:11:58 2022-03-10T15:23:29 CVE Modified Date updated
2022-12-04 18:11:58 Analyzed Vulnerability Status updated