CVE-2010-4020 (GCVE-0-2010-4020)
Vulnerability from cvelistv5 – Published: 2010-12-02 16:00 – Updated: 2024-08-07 03:26
VLAI
EPSS
VEX
Summary
MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.
Severity
6.3 (Medium)
CWE
- n/a
Assigner
References
23 references
Date Public
2010-11-30 00:00
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"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-310"
}
],
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"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*",
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{
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{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:*",
"matchCriteriaId": "758A0011-20ED-414A-9DF3-50A161DF8BC2",
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}
],
"negate": false,
"operator": "OR"
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]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations."
},
{
"lang": "es",
"value": "MIT Kerberos 5 (tambi\u00e9n conocido como krb5) v1.8.x hasta v1.8.3 no rechaza las sumas de comprobaci\u00f3n RC4 (clave de derivaci\u00f3n), lo que podr\u00eda permitir a usuarios remotos autenticados falsificar un (1) AD-SIGNEDPATH o (2) la firma AD-KDC-ISSUED, y posiblemente obtener privilegios, aprovechando el espacio de claves peque\u00f1as que resultan de ciertas operaciones de cifrado de flujo de un byte (one-byte)."
}
],
"id": "CVE-2010-4020",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
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{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 6.8,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
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],
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{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.0"
},
"exploitabilityScore": 2.8,
"impactScore": 3.4,
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"type": "Primary"
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"published": "2010-12-02T16:22:21.207",
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},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T13:01:19+00:00",
"cve": "CVE-2010-4020",
"id": "CVE-2010-4020",
"initial_release_date": "2010-11-30T00:00:00+00:00",
"product_status:fixed": "222",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "krb5: krb5 may accept authdata checksums with low-entropy derived keys (MITKRB5-SA-2010-007)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2010/cve-2010-4020.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-27T02:14:28Z",
"cve": "CVE-2010-4020",
"id": "CVE-2010-4020",
"initial_release_date": "2023-02-15T05:56:18Z",
"product_status:recommended": "248",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2010-4020",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2010-4020.json",
"version": "20"
}
}
}
Loading…
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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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