CVE-2020-14396

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Source
https://cve.org/CVERecord?id=CVE-2020-14396
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14396.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-14396
Downstream
Published
2020-06-17T16:15:11Z
Modified
2026-08-07T16:35:51Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc1500_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc1500_pro_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc1900_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc1900_pro_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc2200_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ],
            "source": "CPE_RANGE",
            "vendor_product": "siemens:simatic_itc2200_pro_firmware"
        },
        {
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "14.04"
                },
                {
                    "last_affected": "14.04"
                },
                {
                    "introduced": "16.04"
                },
                {
                    "last_affected": "16.04"
                },
                {
                    "introduced": "16.04"
                },
                {
                    "last_affected": "16.04"
                },
                {
                    "introduced": "18.04"
                },
                {
                    "last_affected": "18.04"
                },
                {
                    "introduced": "18.10"
                },
                {
                    "last_affected": "18.10"
                },
                {
                    "introduced": "20.04"
                },
                {
                    "last_affected": "20.04"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "canonical:ubuntu_linux"
        },
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                },
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "debian:debian_linux"
        }
    ]
}
References

Affected packages

Git / github.com/libvnc/libvncserver

Affected ranges

Type
GIT
Repo
https://github.com/libvnc/libvncserver
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
0a70095271d845d16a3ed17354841b01f33963ad
Fixed
33441d90a506d5f3ae9388f2752901227e430553
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.9.12"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

LibVNCServer-0.*
LibVNCServer-0.9.10
LibVNCServer-0.9.11
LibVNCServer-0.9.12
LibVNCServer-0.9.8
LibVNCServer-0.9.9
Other
X11VNC_0_9_10
X11VNC_0_9_11
X11VNC_0_9_12
X11VNC_0_9_7
X11VNC_0_9_8
X11VNC_0_9_9
X11VNC_REL_0_9_4
X11VNC_REL_0_9_5
X11VNC_REL_0_9_6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14396.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "289870025509888091998254113739023981642",
            "length": 2497
        },
        "id": "CVE-2020-14396-a63a5cc6",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/libvnc/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553",
        "target": {
            "file": "libvncclient/tls_openssl.c",
            "function": "open_ssl_connection"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "80226186285922043742937663968878156146",
                "23982019333981318047145580796055385006",
                "78556645990089934348837580570819060018",
                "129536370082382921633149900127119405369",
                "179482101782982562967665731851017857863",
                "57481811473761647249782608015147496236",
                "170469348421599386093090533339237144854",
                "132784373091711427979626134283971151697"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-14396-c848c6fe",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/libvnc/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553",
        "target": {
            "file": "libvncclient/tls_openssl.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-07T16:35:51Z"