| Package | Affected versions | Patched versions |
|---|---|---|
| PeterO.Cbor | ≥ 4.0.0, < 4.5.1 | 4.5.1 |
| cbor | ≥ 4.0.0, < 4.5.1 | 4.5.1 |
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.
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.)
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—
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.
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