CVE-2018-20749

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-20749
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20749.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-20749
Downstream
Related
Published
2019-01-30T18:29:00Z
Modified
2025-09-19T09:44:09.458946Z
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 before 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
15bb719c03cc70f14c36a843dcb16ed69b405707

Affected versions

LibVNCServer-0.*

LibVNCServer-0.9.10
LibVNCServer-0.9.11
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": [
        {
            "digest": {
                "function_hash": "234177214934907037875738780921470065452",
                "length": 454.0
            },
            "id": "CVE-2018-20749-4c18c318",
            "source": "https://github.com/libvnc/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707",
            "signature_type": "Function",
            "signature_version": "v1",
            "target": {
                "file": "libvncserver/rfbserver.c",
                "function": "rfbProcessFileTransferReadBuffer"
            },
            "deprecated": false
        },
        {
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "22851802012259854316485533793617137710",
                    "230566275438621502239892882294239741695",
                    "186941204740703548939696912753573588602",
                    "237296104120107525451306638457085077081",
                    "133303737905769428184424510389654335174",
                    "318158163168389883515459339977924360928"
                ]
            },
            "id": "CVE-2018-20749-ed4b1209",
            "source": "https://github.com/libvnc/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707",
            "signature_type": "Line",
            "signature_version": "v1",
            "target": {
                "file": "libvncserver/rfbserver.c"
            },
            "deprecated": false
        }
    ]
}