Description
astral-tokio-tar is a tar archive reading/writing library for async Rust. Versions of astral-tokio-tar prior to 0.5.6 contain a boundary parsing vulnerability that allows attackers to smuggle additional archive entries by exploiting inconsistent PAX/ustar header handling. When processing archives with PAX-extended headers containing size overrides, the parser incorrectly advances stream position based on ustar header size (often zero) instead of the PAX-specified size, causing it to interpret file content as legitimate tar headers. This issue has been patched in version 0.5.6. There are no workarounds.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected products
- astral-sh / tokio-tar< 0.5.6 – < 0.5.6
References
- VENDOR_ADVISORYhttps://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx
- VENDOR_ADVISORYhttps://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9
- PATCHhttps://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318
- MISChttps://edera.dev/stories/tarmageddon
- MISChttps://github.com/edera-dev/cve-tarmageddon