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LOW3.7

GHSA-4v55-cpmv-3vcm

CoreWCF: WS-Security Reference DigestMethod Algorithm-Suite Bypass

Quick fix

GHSA-4v55-cpmv-3vcm — CoreWCF.Primitives: upgrade to the fixed version with the command below.

dotnet add package CoreWCF.Primitives --version 1.8.1

Details

### Impact CoreWCF’s WS-Security 1.0 receive pipeline validates the `SignatureMethod` of an incoming `ds:SignedInfo` against the configured `SecurityAlgorithmSuite`, but does not validate the `DigestMethod` declared on each `ds:Reference`. As a result, a sender can populate `ds:SignedInfo` with `SignatureMethod` values the suite accepts (for example rsa-sha256 under Basic256Sha256) while declaring a per-reference `DigestMethod` the suite rejects (for example http://www.w3.org/2000/09/xmldsig#sha1). The signature is then verified where it permits SHA-1 digests, and the message is accepted.

### Patches Fixed in CoreWCF v1.8.1 and v1.9.1

### Workarounds None

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Affected packages

NuGet/CoreWCF.Primitives
Introduced in: 0Fixed in: 1.8.1
Fixdotnet add package CoreWCF.Primitives --version 1.8.1
NuGet/CoreWCF.Primitives
Introduced in: 1.9.0Fixed in: 1.9.1
Fixdotnet add package CoreWCF.Primitives --version 1.9.1

References