CVE-2021-3405

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Source
https://cve.org/CVERecord?id=CVE-2021-3405
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3405.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-3405
Downstream
Related
Published
2021-02-23T20:15:12.087Z
Modified
2026-07-08T21:27:14.785114Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the implementation of EbmlString::ReadData and EbmlUnicodeString::ReadData in libebml.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ],
            "source": "CPE_STRING"
        },
        {
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
                {
                    "introduced": "32"
                },
                {
                    "last_affected": "32"
                },
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                },
                {
                    "introduced": "34"
                },
                {
                    "last_affected": "34"
                }
            ],
            "source": "CPE_STRING"
        }
    ]
}
References

Affected packages

Git / github.com/matroska-org/libebml

Affected ranges

Type
GIT
Repo
https://github.com/matroska-org/libebml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6c59e5e1ce0087e4465f6d3f479449d3f6bcb167
Database specific 
{
    "cpe": "cpe:2.3:a:matroska:libebml:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.4.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

release-1.*
release-1.3.0
release-1.3.1
release-1.3.10
release-1.3.2
release-1.3.3
release-1.3.4
release-1.3.5
release-1.3.6
release-1.3.7
release-1.3.8
release-1.3.9
release-1.4.0
release-1.4.1

Database specific

vanir_signatures 
[
    {
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "48377290074949130495164895076365827608",
                "316359439968302076612153081825500800864"
            ]
        },
        "target": {
            "file": "src/EbmlVersion.cpp"
        },
        "id": "CVE-2021-3405-de8843e5",
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/matroska-org/libebml/commit/6c59e5e1ce0087e4465f6d3f479449d3f6bcb167",
        "deprecated": false
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3405.json"
vanir_signatures_modified 
"2026-07-08T21:27:14Z"