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CVE-2020-8927 (GCVE-0-2020-8927)

Vulnerability from cvelistv5 – Published: 2020-09-15 09:15 – Updated: 2026-05-29 20:52
VLAI
Title
Buffer overflow in Brotli library
Summary
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-30 14:40 UTC
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
URL Tags
https://github.com/google/brotli/releases/tag/v1.0.9 x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/4568-1/ vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4801 vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
Impacted products
Vendor Product Version CPE status
Google LLC Brotli Affected: stable , ≤ 1.0.7 (custom)
guessed Create a notification for this product.
Credits
Jay Lv <nengzhi.pnz@antgroup.com>
Show details on NVD website
To clipboard 

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      "descriptions": "[{\"lang\": \"en\", \"value\": \"A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a \\\"one-shot\\\" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the \\\"streaming\\\" API as opposed to the \\\"one-shot\\\" API, and impose chunk size limits.\"}, {\"lang\": \"es\", \"value\": \"Se presenta un desbordamiento del b\\u00fafer en la biblioteca Brotli versiones anteriores a 1.0.8, donde un atacante que controla la longitud de entrada de una petici\\u00f3n de descompresi\\u00f3n \\\"one-shot\\\" en un script puede desencadenar un bloqueo, que ocurre cuando se copian fragmentos de datos de m\\u00e1s de 2 GiB .\u0026#xa0;Se recomienda actualizar su biblioteca de Brotli a la versi\\u00f3n 1.0.8 o posterior.\u0026#xa0;Si no se puede actualizar, recomendamos usar la API \\\"streaming\\\" en lugar de la API \\\"one-shot\\\" e imponer l\\u00edmites de tama\\u00f1o de fragmentos\"}]",
      "id": "CVE-2020-8927",
      "lastModified": "2024-11-21T05:39:41.370",
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      "published": "2020-09-15T10:15:12.887",
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T15:47:49+00:00",
      "cve": "CVE-2020-8927",
      "id": "CVE-2020-8927",
      "initial_release_date": "2020-08-27T00:00:00+00:00",
      "product_status:fixed": "208",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "brotli: buffer overflow when input chunk is larger than 2GiB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-8927.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T02:27:07Z",
      "cve": "CVE-2020-8927",
      "id": "CVE-2020-8927",
      "initial_release_date": "2023-02-15T04:01:01Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "67",
      "product_status:recommended": "357",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-8927",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-8927.json",
      "version": "62"
    },
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.