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.
History

Wed, 22 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 21 Oct 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 21 Oct 2025 16:30:00 +0000

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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.
Title astral-tokio-tar Vulnerable to PAX Header Desynchronization
Weaknesses CWE-843
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-21T16:35:13.913Z

Reserved: 2025-10-15T15:03:28.134Z

Link: CVE-2025-62518

cve-icon Vulnrichment

Updated: 2025-10-21T16:35:11.190Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-21T17:15:40.563

Modified: 2025-10-21T19:31:25.450

Link: CVE-2025-62518

cve-icon Redhat

Severity : Important

Publid Date: 2025-10-21T16:13:02Z

Links: CVE-2025-62518 - Bugzilla

cve-icon OpenCVE Enrichment

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