CVE-2021-21272 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Reference

https://github.com/deislabs/oras/commit/96cd90423303f1bb42bd043cb4c36085e6e91e8e https://github.com/deislabs/oras/releases/tag/v0.9.0 https://pkg.go.dev/github.com/deislabs/oras/pkg/oras https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.7