Vulnerability-Lookup

UBUNTU-CVE-2025-62518 (CVE-2025-62518)

Vulnerability from osv_ubuntu – Published: 2025-10-21 17:15 – Updated: 2026-05-20 15:22 – Source website

Details

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)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-62518	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-62518	REPORT
	https://github.com/astral-sh/tokio-tar/security/a…	REPORT
	https://github.com/astral-sh/tokio-tar/commit/22b…	REPORT
	https://edera.dev/stories/tarmageddon	REPORT
	https://github.com/edera-dev/cve-tarmageddon	REPORT
	https://github.com/astral-sh/tokio-tar/commit/22b…	REPORT
	https://github.com/astral-sh/uv/security/advisori…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librust-astral-tokio-tar-dev",
            "binary_version": "0.5.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "rust-astral-tokio-tar",
        "purl": "pkg:deb/ubuntu/rust-astral-tokio-tar@0.5.2-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.1-1",
        "0.5.2-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librust-astral-tokio-tar-dev",
            "binary_version": "0.5.6-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rust-astral-tokio-tar",
        "purl": "pkg:deb/ubuntu/rust-astral-tokio-tar@0.5.6-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.2-2",
        "0.5.5-1",
        "0.5.6-1",
        "0.5.6-2"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2025-62518",
  "modified": "2026-05-20T15:22:57Z",
  "published": "2025-10-21T17:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-62518"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-62518"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318"
    },
    {
      "type": "REPORT",
      "url": "https://edera.dev/stories/tarmageddon"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/edera-dev/cve-tarmageddon"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-62518"
  ]
}

CVE-2025-62518 (GCVE-0-2025-62518)

Vulnerability from cvelistv5 – Published: 2025-10-21 16:13 – Updated: 2025-10-22 13:23

Title

astral-tokio-tar Vulnerable to PAX Header Desynchronization

Summary

Severity

8.1 (High)


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

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

GitHub_M mitre root

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

1 product

Vendor	Product	Version
astral-sh	tokio-tar	Affected: < 0.5.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-62518",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-22T13:18:16.414919Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-22T13:23:33.408Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "tokio-tar",
          "vendor": "astral-sh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.5.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-21T16:13:02.646Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx"
        },
        {
          "name": "https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9"
        },
        {
          "name": "https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318"
        },
        {
          "name": "https://edera.dev/stories/tarmageddon",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://edera.dev/stories/tarmageddon"
        },
        {
          "name": "https://github.com/edera-dev/cve-tarmageddon",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/edera-dev/cve-tarmageddon"
        }
      ],
      "source": {
        "advisory": "GHSA-j5gw-2vrg-8fgx",
        "discovery": "UNKNOWN"
      },
      "title": "astral-tokio-tar Vulnerable to PAX Header Desynchronization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-62518",
    "datePublished": "2025-10-21T16:13:02.646Z",
    "dateReserved": "2025-10-15T15:03:28.134Z",
    "dateUpdated": "2025-10-22T13:23:33.408Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

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.

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.