SB2021012530 - Insecure archive handling in oras

Description

This security bulletin contains information about 1 vulnerability.

1) Link following (CVE-ID: CVE-2021-21272)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to overwrite files on the system.

The vulnerability exists due to insecure hardlink following when extracting files from an archive. A remote attacker can trick the victim into downloading a gzipped tarballs that will be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links.

Remediation

Install update from vendor's website.

References

• 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