CVE-2018-20750

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-20750
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20750.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-20750
Downstream
Related
Published
2019-01-30T18:29:00Z
Modified
2025-10-15T09:33:01.324229Z
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

LibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

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
09e8fc02f59f16e2583b34fe1a270c238bd9ffec

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

[
    {
        "signature_type": "Line",
        "deprecated": false,
        "source": "https://github.com/libvnc/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238bd9ffec",
        "signature_version": "v1",
        "target": {
            "file": "libvncserver/rfbserver.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "208450598643815690107221870743096516411",
                "188468696327442976591528711100647299430",
                "339810309386704794107010451385675606359",
                "325020323779306967113667985277008054327",
                "252246010401280782980771499642649312175",
                "331557240631615908433514250914876982357",
                "326762681830792334858650571106630307146",
                "75410939976826082944537545891517174339"
            ]
        },
        "id": "CVE-2018-20750-936cab71"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "source": "https://github.com/libvnc/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238bd9ffec",
        "signature_version": "v1",
        "target": {
            "function": "rfbProcessFileTransferReadBuffer",
            "file": "libvncserver/rfbserver.c"
        },
        "digest": {
            "function_hash": "7250474722688794593813454546579474339",
            "length": 639.0
        },
        "id": "CVE-2018-20750-a5a2e1bb"
    }
]