RUSTSEC-2025-0110

    Dashboard / Vulnerabilities / RUSTSEC-2025-0110

    RUSTSEC-2025-0110

    Published: 21 Oct 2025Last Modified: 17 Jan 2026

    Summary: astral-tokio-tar Vulnerable to PAX Header Desynchronization

    Details: 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 vulnerability was disclosed to multiple Rust tar parsers, all derived from the original async-tar fork of tar-rs. For additional information see [Edera's blog post](https://edera.dev/stories/tarmageddon).

    References: https://crates.io/crates/astral-tokio-tar, https://rustsec.org/advisories/RUSTSEC-2025-0110.html, https://github.com/advisories/GHSA-j5gw-2vrg-8fgx

    Affected packages

    Package

    Name: astral-tokio-tar

    Purl: pkg:cargo/astral-tokio-tar

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.0.0-0
    Fixed -0.5.6

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RUSTSEC-2025-0110 | CVE-DB