astral-tokio-tar Vulnerable to PAX Header Desynchronization_CVE-2025-62518

8.1 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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.

Basic Information

ID CVE-2025-62518

Source GitHub_M

Published Oct 21, 2025 at 16:13

Modified Oct 21, 2025 at 16:35

Affected Product

Vendor astral-sh

Product tokio-tar

Version < 0.5.6

Affected Versions astral-sh tokio-tar < 0.5.6

CWE Classification

CWE-843

References

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    "published": "2025-10-21T16:13:02.646Z",
    "modified": "2025-10-21T16:35:13.913Z",
    "type": "cve",
    "title": "astral-tokio-tar Vulnerable to PAX Header Desynchronization",
    "source": "GitHub_M",
    "references": "https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx\nhttps://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9\nhttps://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318\nhttps://edera.dev/stories/tarmageddon\nhttps://github.com/edera-dev/cve-tarmageddon",
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