CVE-2020-14396 : An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls

An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.

Published 2020-06-17 16:15:12

Updated 2022-03-10 15:15:04

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2020-14396

Debian » Debian Linux » Version: 8.0
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Siemens » Simatic Itc1500 Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc1500 » Version: N/A
Siemens » Simatic Itc1500 Pro Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc1500 Pro » Version: N/A
Siemens » Simatic Itc1900 Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc1900 » Version: N/A
Siemens » Simatic Itc1900 Pro Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc1900 Pro » Version: N/A
Siemens » Simatic Itc2200 Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc2200 » Version: N/A
Siemens » Simatic Itc2200 Pro Firmware
Versions from including (>=) 3.0.0.0 and before (<) 3.2.1.0
cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Itc2200 Pro » Version: N/A
Canonical » Ubuntu Linux » Version: 14.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.10
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions
Libvnc Project » Libvncserver
Versions up to, including, (<=) 0.9.12
cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-14396

EPSS FAQ

0.16%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 53 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-14396

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2020-14396

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-14396

https://usn.ubuntu.com/4434-1/

USN-4434-1: LibVNCServer vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://github.com/LibVNC/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553

libvncclient/tls_openssl: do not deref a NULL pointer · LibVNC/libvncserver@33441d9 · GitHub
Patch;Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf

Patch;Third Party Advisory

CVEs referencing this url
https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13

Comparing LibVNCServer-0.9.12...LibVNCServer-0.9.13 · LibVNC/libvncserver · GitHub
Release Notes;Third Party Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2020-14396

Products affected by CVE-2020-14396

Exploit prediction scoring system (EPSS) score for CVE-2020-14396

CVSS scores for CVE-2020-14396

CWE ids for CVE-2020-14396

References for CVE-2020-14396