CVE-2019-20839

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Source
https://nvd.nist.gov/vuln/detail/CVE-2019-20839
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20839.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2019-20839
Downstream
Related
Published
2020-06-17T16:15:11Z
Modified
2025-10-21T05:03:30.366503Z
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

libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.

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
3fd03977c9b35800d73a865f167338cb4d05b0c1

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/3fd03977c9b35800d73a865f167338cb4d05b0c1",
        "target": {
            "file": "libvncclient/sockets.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2019-20839-05ce48f7",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "52876093981780426855339000577121701361",
                "219712199165541620599692929659710770492",
                "171295154040440005142750223507192156157",
                "335200676590474681522118523928735727245"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/libvnc/libvncserver/commit/3fd03977c9b35800d73a865f167338cb4d05b0c1",
        "target": {
            "function": "ConnectClientToUnixSock",
            "file": "libvncclient/sockets.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2019-20839-ec50ec35",
        "digest": {
            "length": 609.0,
            "function_hash": "141014285350177029189592347789716145813"
        },
        "signature_type": "Function"
    }
]