fkie_cve-2017-2669
Vulnerability from fkie_nvd
Published
2018-06-21 13:29
Modified
2024-11-21 03:23
Severity ?
3.7 (Low) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| dovecot | dovecot | * | |
| debian | debian_linux | 8.0 |
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D6A0F511-D72E-464A-BA7B-477C9CC0B479",
"versionEndIncluding": "2.2.28",
"versionStartIncluding": "2.2.26",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Dovecot before version 2.2.29 is vulnerable to a denial of service. When \u0027dict\u0027 passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."
},
{
"lang": "es",
"value": "Dovecot en versiones anteriores a la 2.2.29 es vulnerable a una denegaci\u00f3n de servicio (DoS). Cuando se emplearon los \"dict\" passdb y userdb para la autenticaci\u00f3n de usuarios, el nombre de usuario enviado por el cliente IMAP/POP3 se envi\u00f3 mediante var_expand() para realizar la expansi\u00f3n de %variable. El env\u00edo de campos %variable especialmente manipulados podr\u00eda resultar en un uso excesivo de memoria que provoca que el proceso se cierre inesperadamente (y se reinicie) o en un uso excesivo de CPU que provoca que todas las autenticaciones dejen de responder."
}
],
"id": "CVE-2017-2669",
"lastModified": "2024-11-21T03:23:56.570",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
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"integrityImpact": "NONE",
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},
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"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
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"baseScore": 3.7,
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"scope": "UNCHANGED",
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{
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"integrityImpact": "NONE",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"impactScore": 3.6,
"source": "nvd@nist.gov",
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},
"published": "2018-06-21T13:29:00.317",
"references": [
{
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"tags": [
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},
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},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"
},
{
"source": "secalert@redhat.com",
"tags": [
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],
"url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"
},
{
"source": "secalert@redhat.com",
"tags": [
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"url": "https://www.debian.org/security/2017/dsa-3828"
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},
{
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],
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},
{
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"tags": [
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],
"url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://www.debian.org/security/2017/dsa-3828"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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