CVE-2020-14398

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Source
https://cve.org/CVERecord?id=CVE-2020-14398
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14398.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-14398
Downstream
Related
Published
2020-06-17T16:15:11.837Z
Modified
2026-08-07T16:35:52.921596Z
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. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:simatic_itc1500_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:simatic_itc1500_pro_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:simatic_itc1900_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:simatic_itc1900_pro_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:simatic_itc2200_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "cpes": [
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            ],
            "vendor_product": "siemens:simatic_itc2200_pro_firmware",
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "3.0.0.0"
                },
                {
                    "fixed": "3.2.1.0"
                }
            ]
        },
        {
            "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:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "source": "CPE_STRING",
            "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"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                },
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ]
        },
        {
            "cpes": [
                "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "introduced": "15.2"
                },
                {
                    "last_affected": "15.2"
                }
            ]
        }
    ]
}
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
57433015f856cc12753378254ce4f1c78f5d9c7b
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.9.12"
        }
    ]
}

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

vanir_signatures_modified 
"2026-08-07T16:35:52Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14398.json"
vanir_signatures 
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        "signature_version": "v1",
        "digest": {
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            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-14398-475aebc7",
        "source": "https://github.com/libvnc/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b",
        "target": {
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        "source": "https://github.com/libvnc/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b",
        "target": {
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            "threshold": 0.9
        },
        "id": "CVE-2020-14398-c26dc7dd",
        "source": "https://github.com/libvnc/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b",
        "target": {
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    },
    {
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
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            "function_hash": "254707495691174405563156847212044692456"
        },
        "id": "CVE-2020-14398-c3c16db2",
        "source": "https://github.com/libvnc/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b",
        "target": {
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        }
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    {
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        "digest": {
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            "function_hash": "54417766686695289676091539773525012280"
        },
        "id": "CVE-2020-14398-d84cf98c",
        "source": "https://github.com/libvnc/libvncserver/commit/57433015f856cc12753378254ce4f1c78f5d9c7b",
        "target": {
            "function": "ReadFromRFBServer",
            "file": "libvncclient/sockets.c"
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    }
]