CVE-2019-20788

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Source
https://cve.org/CVERecord?id=CVE-2019-20788
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20788.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2019-20788
Downstream
Related
Published
2020-04-23T19:15:12.763Z
Modified
2026-07-08T17:17:20.774343Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.

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:*:*:*:*:*:*:*"
            ],
            "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"
                }
            ],
            "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
54220248886b5001fbbb9fa73c4e1a2cb9413fed
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.9.12"
        }
    ],
    "cpe": "cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*",
    "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

vanir_signatures_modified 
"2026-07-08T17:17:20Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20788.json"
vanir_signatures 
[
    {
        "signature_type": "Function",
        "target": {
            "file": "libvncclient/cursor.c",
            "function": "HandleCursorShape"
        },
        "deprecated": false,
        "digest": {
            "length": 2878.0,
            "function_hash": "166509097659370788785687778228924176187"
        },
        "id": "CVE-2019-20788-189abd97",
        "source": "https://github.com/libvnc/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "target": {
            "file": "libvncclient/cursor.c"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "102057262279662452688778988803141241357",
                "175955773102106351237323041340518821685",
                "240545567691954465949188256110399956644",
                "204796747639085440341262894639991613085"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2019-20788-36246abd",
        "source": "https://github.com/libvnc/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed",
        "signature_version": "v1"
    }
]