CVE-2025-4444 (GCVE-0-2025-4444)
Vulnerability from cvelistv5 – Published: 2025-09-18 13:58 – Updated: 2025-09-18 20:41 X_Open Source
VLAI
EPSS
VEX
Title
Tor Onion Service Descriptor resource consumption
Summary
A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler. Performing manipulation results in resource consumption. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is considered difficult. Upgrading to version 0.4.8.18 and 0.4.9.3-alpha is recommended to address this issue. It is recommended to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-18 20:41 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.324814 | vdb-entry |
| https://vuldb.com/?ctiid.324814 | signaturepermissions-required |
| https://vuldb.com/?submit.640605 | third-party-advisory |
| https://github.com/chunmianwang/Tordos | related |
| https://gitlab.torproject.org/tpo/core/tor/-/raw/… | release-notes |
| https://forum.torproject.org/t/alpha-and-stable-r… | patch |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| n/a | Tor |
Affected:
0.4.7.0
Affected: 0.4.7.1 Affected: 0.4.7.2 Affected: 0.4.7.3 Affected: 0.4.7.4 Affected: 0.4.7.5 Affected: 0.4.7.6 Affected: 0.4.7.7 Affected: 0.4.7.8 Affected: 0.4.7.9 Affected: 0.4.7.10 Affected: 0.4.7.11 Affected: 0.4.7.12 Affected: 0.4.7.13 Affected: 0.4.7.14 Affected: 0.4.7.15 Affected: 0.4.7.16 Affected: 0.4.8.0 Affected: 0.4.8.1 Affected: 0.4.8.2 Affected: 0.4.8.3 Affected: 0.4.8.4 Affected: 0.4.8.5 Affected: 0.4.8.6 Affected: 0.4.8.7 Affected: 0.4.8.8 Affected: 0.4.8.9 Affected: 0.4.8.10 Affected: 0.4.8.11 Affected: 0.4.8.12 Affected: 0.4.8.13 Affected: 0.4.8.14 Affected: 0.4.8.15 Affected: 0.4.8.16 Affected: 0.4.8.17 Unaffected: 0.4.8.18 Unaffected: 0.4.9.3-alpha |
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},
{
"status": "affected",
"version": "0.4.7.3"
},
{
"status": "affected",
"version": "0.4.7.4"
},
{
"status": "affected",
"version": "0.4.7.5"
},
{
"status": "affected",
"version": "0.4.7.6"
},
{
"status": "affected",
"version": "0.4.7.7"
},
{
"status": "affected",
"version": "0.4.7.8"
},
{
"status": "affected",
"version": "0.4.7.9"
},
{
"status": "affected",
"version": "0.4.7.10"
},
{
"status": "affected",
"version": "0.4.7.11"
},
{
"status": "affected",
"version": "0.4.7.12"
},
{
"status": "affected",
"version": "0.4.7.13"
},
{
"status": "affected",
"version": "0.4.7.14"
},
{
"status": "affected",
"version": "0.4.7.15"
},
{
"status": "affected",
"version": "0.4.7.16"
},
{
"status": "affected",
"version": "0.4.8.0"
},
{
"status": "affected",
"version": "0.4.8.1"
},
{
"status": "affected",
"version": "0.4.8.2"
},
{
"status": "affected",
"version": "0.4.8.3"
},
{
"status": "affected",
"version": "0.4.8.4"
},
{
"status": "affected",
"version": "0.4.8.5"
},
{
"status": "affected",
"version": "0.4.8.6"
},
{
"status": "affected",
"version": "0.4.8.7"
},
{
"status": "affected",
"version": "0.4.8.8"
},
{
"status": "affected",
"version": "0.4.8.9"
},
{
"status": "affected",
"version": "0.4.8.10"
},
{
"status": "affected",
"version": "0.4.8.11"
},
{
"status": "affected",
"version": "0.4.8.12"
},
{
"status": "affected",
"version": "0.4.8.13"
},
{
"status": "affected",
"version": "0.4.8.14"
},
{
"status": "affected",
"version": "0.4.8.15"
},
{
"status": "affected",
"version": "0.4.8.16"
},
{
"status": "affected",
"version": "0.4.8.17"
},
{
"status": "unaffected",
"version": "0.4.8.18"
},
{
"status": "unaffected",
"version": "0.4.9.3-alpha"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "wocanmei (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler. Performing manipulation results in resource consumption. The attack may be initiated remotely. The attack\u0027s complexity is rated as high. The exploitability is considered difficult. Upgrading to version 0.4.8.18 and 0.4.9.3-alpha is recommended to address this issue. It is recommended to upgrade the affected component."
},
{
"lang": "de",
"value": "In Tor up to 0.4.7.16/0.4.8.17 wurde eine Schwachstelle gefunden. Hierbei betrifft es unbekannten Programmcode der Komponente Onion Service Descriptor Handler. Dank der Manipulation mit unbekannten Daten kann eine resource consumption-Schwachstelle ausgenutzt werden. Der Angriff l\u00e4sst sich \u00fcber das Netzwerk starten. Die Komplexit\u00e4t eines Angriffs ist eher hoch. Es wird angegeben, dass die Ausnutzbarkeit schwierig ist. Ein Upgrade auf Version 0.4.8.18 and 0.4.9.3-alpha ist in der Lage, dieses Problem zu adressieren. Die Aktualisierung der betroffenen Komponente wird empfohlen."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 2.6,
"vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-404",
"description": "Denial of Service",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-18T14:00:17.385Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-324814 | Tor Onion Service Descriptor resource consumption",
"tags": [
"vdb-entry"
],
"url": "https://vuldb.com/?id.324814"
},
{
"name": "VDB-324814 | CTI Indicators (IOB, IOC, TTP)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.324814"
},
{
"name": "Submit #640605 | Tor \u2264 0.4.8 Memory Management vulnerability",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.640605"
},
{
"tags": [
"related"
],
"url": "https://github.com/chunmianwang/Tordos"
},
{
"tags": [
"release-notes"
],
"url": "https://gitlab.torproject.org/tpo/core/tor/-/raw/release-0.4.8/ReleaseNotes"
},
{
"tags": [
"patch"
],
"url": "https://forum.torproject.org/t/alpha-and-stable-release-0-4-8-18-and-0-4-9-3-alpha/20578"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2025-09-16T00:00:00.000Z",
"value": "Countermeasure disclosed"
},
{
"lang": "en",
"time": "2025-09-18T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-18T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-18T16:05:09.000Z",
"value": "VulDB entry last update"
}
],
"title": "Tor Onion Service Descriptor resource consumption"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-4444",
"datePublished": "2025-09-18T13:58:52.524Z",
"dateReserved": "2025-05-08T17:01:45.724Z",
"dateUpdated": "2025-09-18T20:41:21.835Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.