Headline
CVE-2021-21272: Merge pull request from GHSA-g5v4-5x39-vwhx · oras-project/oras@96cd904
ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a “zip-slip” vulnerability. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs oras pull
. Users of the affected versions are impacted if they are oras
CLI users who runs oras pull
, or if they are Go programs, which invoke github.com/deislabs/oras/pkg/content.FileStore
. The problem has been fixed in version 0.9.0. For oras
CLI users, there is no workarounds other than pulling from a trusted artifact provider. For oras
package users, the workaround is to not use github.com/deislabs/oras/pkg/content.FileStore
, and use other content stores instead, or pull from a trusted artifact provider.
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* check hard link
* no following symbolic link
* bug fix
* add initial test to reproduce GHSA-g5v4-5x39-vwhx
Signed-off-by: jdolitsky [email protected]
* fix test for symbolic link
* fix bug
* add test for hardlink
Signed-off-by: jdolitsky [email protected]
* catch the parent folder
* remove check for hard link for consistency
* remove unncessary test for hard links
* Revert “remove unncessary test for hard links”
This reverts commit b3136611810f49074dfc6aef158b3d24466d2ed9.
* Revert “remove check for hard link for consistency”
This reverts commit d7b7346598c92ff9c430a42763d810b34d3f1ac2.
* check links for all link types
* add tests
Co-authored-by: jdolitsky [email protected]
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