Vulnerability · Published Jan 25, 2021 · Assigned by GitHub_M
CVE-2021-21272zip slip in ORAS
High 7.7
In plain English
A high-severity path traversal in oras from deislabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/deislabs/oras | 0.9.0 | GHSA-g5v4-5x39-vwhx |
| Go | github.com/deislabs/oras | 0.9.0 | GO-2021-0099 |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
References
- https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx x_refsource_CONFIRM
- https://github.com/deislabs/oras/commit/96cd90423303f1bb42bd043cb4c36085e6e91e8e x_refsource_MISC
- https://github.com/deislabs/oras/releases/tag/v0.9.0 x_refsource_MISC
- https://pkg.go.dev/github.com/deislabs/oras/pkg/oras x_refsource_MISC