CVE-2021-41190Low· 3.0▾ SunlitClarify Content-Type handling
▾ Sunlit zone — Low / medium · no exploitation signal
impact 16.5 · likelihood 0.4 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
2.1%
2.1% → 2.2%
In the OCI Distribution Specification version 1.0.0 and prior, the Content-Type header alone was used to determine the type of document during push and pull operations. Documents that contain both “manifests” and “layers” fields could be interpreted as either a manifest or an index in the absence of an accompanying Content-Type header. If a Content-Type header changed between two pulls of the same digest, a client may interpret the resulting content differently.
The OCI Distribution Specification will be updated to require that a mediaType value present in a manifest or index match the Content-Type header used during the push and pull operations.
Clients pulling from a registry may distrust the Content-Type header and reject an ambiguous document that contains both “manifests” and “layers” fields or “manifests” and “config” fields.
https://github.com/opencontainers/image-spec/security/advisories/GHSA-77vh-xpmg-72qh
If you have any questions or comments about this advisory:
github.com/opencontainers/distribution-spec < 1.0.1Upgrade to a patched release:
github.com/opencontainers/distribution-spec 1.0.1Connected by shared product, vendor, weakness, or advisory.
GHSA-77vh-xpmg-72qhLow· 3.0Clarify `mediaType` handling
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