CVE-2020-36430

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Source
https://cve.org/CVERecord?id=CVE-2020-36430
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-36430.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-36430
Downstream
Related
Published
2021-07-20T07:15:07.817Z
Modified
2026-02-24T11:35:27.566466Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decodechars (called from decodefont and process_text) because the wrong integer data type is used for subtraction.

References

Affected packages

Git / github.com/libass/libass

Affected ranges

Type
GIT
Repo
https://github.com/libass/libass
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
017137471d0043e0321e377ed8da48e45a3ec632

Affected versions

0.*
0.10.0
0.10.1
0.10.2
0.11.0
0.11.1
0.11.2
0.12.0
0.12.1
0.12.2
0.12.3
0.13.0
0.13.1
0.13.2
0.13.3
0.13.4
0.13.5
0.13.6
0.13.7
0.14.0
0.15.0
0.9.10
0.9.11
0.9.12
0.9.7
0.9.8
0.9.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-36430.json"
vanir_signatures 
[
    {
        "signature_version": "v1",
        "id": "CVE-2020-36430-1e115502",
        "source": "https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632",
        "digest": {
            "function_hash": "110991188393091881186985668039830991525",
            "length": 1124.0
        },
        "target": {
            "file": "libass/ass.c",
            "function": "decode_font"
        },
        "signature_type": "Function",
        "deprecated": false
    },
    {
        "signature_version": "v1",
        "id": "CVE-2020-36430-dd9ed4a7",
        "source": "https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "237761427446648667051004743683370618705",
                "203614521959843642792803634604266039747",
                "167057952582482068803313308181837134398",
                "185673660414575620126904484215688046936",
                "78573754609072835798149174981656735930",
                "103499063678342063401077868684384475532",
                "334814143342617232491248731862329862754",
                "124461199810427598757175082018620638494"
            ]
        },
        "target": {
            "file": "libass/ass.c"
        },
        "signature_type": "Line",
        "deprecated": false
    }
]