CVE-2019-20788

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Source
https://nvd.nist.gov/vuln/detail/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
2020-04-23T19:15:12Z
Modified
2025-10-21T05:03:28.037796Z
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.

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
Fixed
54220248886b5001fbbb9fa73c4e1a2cb9413fed

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

[
    {
        "source": "https://github.com/libvnc/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed",
        "target": {
            "function": "HandleCursorShape",
            "file": "libvncclient/cursor.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "id": "CVE-2019-20788-189abd97",
        "signature_type": "Function",
        "digest": {
            "function_hash": "166509097659370788785687778228924176187",
            "length": 2878.0
        }
    },
    {
        "source": "https://github.com/libvnc/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed",
        "target": {
            "file": "libvncclient/cursor.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "id": "CVE-2019-20788-36246abd",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "102057262279662452688778988803141241357",
                "175955773102106351237323041340518821685",
                "240545567691954465949188256110399956644",
                "204796747639085440341262894639991613085"
            ],
            "threshold": 0.9
        }
    }
]