CVE-2020-14399

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Source
https://cve.org/CVERecord?id=CVE-2020-14399
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-14399.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-14399
Downstream
DEBIAN (1)
MGASA (1)
openSUSE (4)
SUSE (3)
UBUNTU (1)
Related
openSUSE (4)
SUSE (3)
Published
2020-06-17T16:15:11Z
Modified
2026-08-18T13:28:51Z
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

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

Database specific 
{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
            ],
            "extracted_events":  [
                {
                    "introduced":  "16.04"
                },
                {
                    "last_affected":  "16.04"
                },
                {
                    "introduced":  "18.04"
                },
                {
                    "last_affected":  "18.04"
                },
                {
                    "introduced":  "20.04"
                },
                {
                    "last_affected":  "20.04"
                }
            ],
            "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"
        },
        {
            "cpes":  [
                "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
                "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "introduced":  "15.1"
                },
                {
                    "last_affected":  "15.1"
                },
                {
                    "introduced":  "15.2"
                },
                {
                    "last_affected":  "15.2"
                }
            ],
            "source":  "CPE_STRING",
            "vendor_product":  "opensuse:leap"
        }
    ]
}
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
2aa20dad4c23c18948d3f63b33f9dfec1f837729
Fixed
23e5cbe6b090d7f22982aee909a6a618174d3c2d
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.9.13"
        }
    ],
    "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

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-14399.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "292719199051264423232023195326445512722",
            "length":  6767
        },
        "id":  "CVE-2020-14399-2ff28e15",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/libvnc/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d",
        "target":  {
            "file":  "libvncclient/rfbproto.c",
            "function":  "SetFormatAndEncodings"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "289411994645727400457192257966915221379",
                "208837877831103949359398245394014295558",
                "332985853190493794914941061839301886752",
                "88759214378154492617504044073384416189",
                "101271520213990510100092381220390867601",
                "55113811666554751528682358494177991134",
                "181492142388692610613554751535531639094",
                "218617286323755537607650297728216934745",
                "29442809713893014097360319726760739566",
                "285295838407132926322499123666082004538"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2020-14399-4d282684",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/libvnc/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d",
        "target":  {
            "file":  "libvncclient/rfbproto.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-18T13:28:51Z"