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:
www.openwall.com/lists/oss-security/2021/11/19/10
github.com/opencontainers/distribution-spec
github.com/opencontainers/distribution-spec/commit/ac28cac0557bcd3084714ab09f9f2356fe504923
github.com/opencontainers/distribution-spec/security/advisories/GHSA-mc8v-mgrf-8f4m
lists.fedoraproject.org/archives/list/[email protected]/message/3TUZNDAH2B26VPBK342UC3BHZNLBUXGX
lists.fedoraproject.org/archives/list/[email protected]/message/4334HT7AZPLWNYHW4ARU6JBUF3VZJPZN
lists.fedoraproject.org/archives/list/[email protected]/message/A2RRFNTMFYKOTRKD37F5ANMCIO3GGJML
lists.fedoraproject.org/archives/list/[email protected]/message/DX63GRWFEI5RVMYV6XLMCG4OHPWZML27
lists.fedoraproject.org/archives/list/[email protected]/message/RZTO6N55WHKHIZI4IMLY2QFBPMVTAERM
lists.fedoraproject.org/archives/list/[email protected]/message/SQBCYJUIM5GVCMFUPRWKRZNXMMI5EFA4
lists.fedoraproject.org/archives/list/[email protected]/message/T4OJ764CKKCWCVONHD4YXTGR7HZ7LRUV
lists.fedoraproject.org/archives/list/[email protected]/message/YIGVQWOA5XXCQXEOOKZX4CDAGLBDRPRX
nvd.nist.gov/vuln/detail/CVE-2021-41190