An issue was discovered in the tar crate before 0.4.36 for Rust. When symlinks are present in a TAR archive, extraction can create arbitrary directories via .. traversal.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tar | Tar_project | * | 0.4.36 (excluding) |
| Rust-tar | Ubuntu | focal | * |
| Rust-tar | Ubuntu | hirsute | * |
| Rust-tar | Ubuntu | impish | * |
| Rust-tar | Ubuntu | kinetic | * |
| Rust-tar | Ubuntu | lunar | * |
| Rust-tar | Ubuntu | mantic | * |
| Rust-tar | Ubuntu | oracular | * |
| Rust-tar | Ubuntu | plucky | * |
| Rust-tar | Ubuntu | trusty | * |
| Rust-tar | Ubuntu | xenial | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html