GSD-2021-22212
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '#' characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the '#'. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-22212",
"description": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them.",
"id": "GSD-2021-22212",
"references": [
"https://www.suse.com/security/cve/CVE-2021-22212.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-22212"
],
"details": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them.",
"id": "GSD-2021-22212",
"modified": "2023-12-13T01:23:24.485282Z",
"schema_version": "1.4.0"
}
},
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"affects": {
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"product": {
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"product_name": "ntpsec",
"version": {
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"credit": [
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"lang": "eng",
"value": "Maciej Zenczykowski"
}
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"value": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them."
}
]
},
"impact": {
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"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
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"value": "Improper filtering of special elements in ntpsec"
}
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"references": {
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"name": "https://gitlab.com/NTPsec/ntpsec/-/issues/699",
"refsource": "MISC",
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/699"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859"
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/"
}
]
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"value": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them."
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"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/699"
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"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859",
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
"version": "2.0"
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"severity": "MEDIUM",
"userInteractionRequired": false
},
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"attackVector": "NETWORK",
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"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
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"exploitabilityScore": 2.2,
"impactScore": 5.2
}
},
"lastModifiedDate": "2022-06-04T03:02Z",
"publishedDate": "2021-06-08T13:15Z"
}
}
}
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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 |
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Nomenclature
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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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