CVE-2025-62518 (GCVE-0-2025-62518)
Vulnerability from cvelistv5 – Published: 2025-10-21 16:13 – Updated: 2025-10-22 13:23
VLAI
EPSS
VEX
Title
astral-tokio-tar Vulnerable to PAX Header Desynchronization
Summary
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.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-22 13:18 UTC
CWE
- CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/astral-sh/tokio-tar/security/a… | x_refsource_CONFIRM |
| https://github.com/astral-sh/uv/security/advisori… | x_refsource_MISC |
| https://github.com/astral-sh/tokio-tar/commit/22b… | x_refsource_MISC |
| https://edera.dev/stories/tarmageddon | x_refsource_MISC |
| https://github.com/edera-dev/cve-tarmageddon | x_refsource_MISC |
Impacted products
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{
"name": "https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318",
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"value": "astral-tokio-tar es una biblioteca de lectura/escritura de archivos tar para Rust as\u00edncrono. Las versiones de astral-tokio-tar anteriores a la 0.5.6 contienen una vulnerabilidad de an\u00e1lisis de l\u00edmites que permite a los atacantes introducir entradas de archivo adicionales explotando un manejo inconsistente de las cabeceras PAX/ustar. Al procesar archivos con cabeceras PAX extendidas que contienen anulaciones de tama\u00f1o, el analizador avanza incorrectamente la posici\u00f3n del flujo bas\u00e1ndose en el tama\u00f1o de la cabecera ustar (a menudo cero) en lugar del tama\u00f1o especificado por PAX, lo que hace que interprete el contenido del archivo como cabeceras tar leg\u00edtimas. Este problema ha sido parcheado en la versi\u00f3n 0.5.6. No hay soluciones alternativas."
}
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"id": "CVE-2025-62518",
"lastModified": "2026-10-08T11:10:00.250",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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