Denial of service in CBOR library
Impact
Due to this library's use of an inefficient algorithm, it is vulnerable to a denial of service attack when a maliciously crafted input is passed to DecodeFromBytes or other CBOR decoding mechanisms in this library.
Affected versions include versions 4.0.0 through 4.5.0.
This vulnerability was privately reported to me.
Patches
This issue has been fixed in version 4.5.1. Users should use the latest version of this library. (The latest version is not necessarily 4.5.1. Check the NuGet page to see the latest version's version number.)
Workarounds
Again, users should use the latest version of this library.
In the meantime, note that the inputs affected by this issue are all CBOR maps or contain CBOR maps. An input that decodes to a single CBOR object is not capable of containing a CBOR map if—
- it begins with a byte other than 0x80 through 0xDF, or
- it does not contain a byte in the range 0xa0 through 0xBF.
Such an input is not affected by this vulnerability and an application can choose to perform this check before passing it to a CBOR decoding mechanism.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the CBOR repository.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| .NET (NuGet) | PeterO.Cbor | >= 4.0.0, < 4.5.1 | 4.5.1 |
Referencias
- Debilidad (CWE)
CWE-407- Plataforma
- .NET (NuGet)
- Paquete
PeterO.Cbor- Publicada
- 21.01.2022
- Actualizado
- 11.10.2026 11:23
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-6r92-cgxc-r5fg - CC BY 4.0
Historial de vulnerabilidades: PeterO.Cbor
Todas las vulnerabilidades publicadas de este paquete (.NET (NuGet)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 09.2019 01.2022
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 2
Divulgaciones por año
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Denial of service in CBOR library esta entrada
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