CVE-2009-4565 (GCVE-0-2009-4565)
Vulnerability from cvelistv5 – Published: 2010-01-04 21:00 – Updated: 2024-08-07 07:08
VLAI
EPSS
VEX
Summary
sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
20 references
Date Public
2009-12-30 00:00
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"value": "sendmail anterior a v8.14.4 no maneja adecuadamente un car\u00e1cter \u0027\\0\u0027 en un fichero Common Name (CN) de un certificado X.509; esto permite (1) a atacantes del tipo hombre-en-el-medio suplantar a su elecci\u00f3n servidores SMTP basados en SSL utilizando un certificado de servidor manipulado expedido por una Autoridad Certificadora leg\u00edtima y (2) a atacantes remotos evitar las restricciones de acceso pretendidas a trav\u00e9s de un certificado cliente expedido por una Autoridad Certificadora leg\u00edtima. Vulnerabilidad relacionada con CVE-2009-2408."
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],
"negate": false,
"operator": "OR"
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]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "sendmail before 8.14.4 does not properly handle a \u0027\\0\u0027 character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408."
},
{
"lang": "es",
"value": "sendmail anterior a v8.14.4 no maneja adecuadamente un car\u00e1cter \u0027\\0\u0027 en un fichero Common Name (CN) de un certificado X.509; esto permite (1) a atacantes del tipo hombre-en-el-medio suplantar a su elecci\u00f3n servidores SMTP basados en SSL utilizando un certificado de servidor manipulado expedido por una Autoridad Certificadora leg\u00edtima y (2) a atacantes remotos evitar las restricciones de acceso pretendidas a trav\u00e9s de un certificado cliente expedido por una Autoridad Certificadora leg\u00edtima. Vulnerabilidad relacionada con CVE-2009-2408."
}
],
"id": "CVE-2009-4565",
"lastModified": "2026-04-23T00:35:47.467",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": true,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2010-01-04T21:30:00.640",
"references": [
{
"source": "cve@mitre.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html"
},
{
"source": "cve@mitre.org",
"url": "http://marc.info/?l=bugtraq\u0026m=126953289726317\u0026w=2"
},
{
"source": "cve@mitre.org",
"tags": [
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],
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},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/38314"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/38915"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/39088"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/40109"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/43366"
},
{
"source": "cve@mitre.org",
"url": "http://security.gentoo.org/glsa/glsa-201206-30.xml"
},
{
"source": "cve@mitre.org",
"url": "http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021797.1-1"
},
{
"source": "cve@mitre.org",
"url": "http://www.debian.org/security/2010/dsa-1985"
},
{
"source": "cve@mitre.org",
"url": "http://www.redhat.com/support/errata/RHSA-2011-0262.html"
},
{
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"url": "http://www.securityfocus.com/bid/37543"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "http://www.sendmail.org/releases/8.14.4"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "http://www.vupen.com/english/advisories/2009/3661"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2010/0719"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2010/1386"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2011/0415"
},
{
"source": "cve@mitre.org",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10255"
},
{
"source": "cve@mitre.org",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11822"
},
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},
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},
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"tags": [
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},
{
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"url": "http://secunia.com/advisories/38314"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/38915"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/39088"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/40109"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/43366"
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"tags": [
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"tags": [
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"url": "http://www.vupen.com/english/advisories/2009/3661"
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{
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"url": "http://www.vupen.com/english/advisories/2010/0719"
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{
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{
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{
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"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10255"
},
{
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"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11822"
}
],
"sourceIdentifier": "cve@mitre.org",
"vendorComments": [
{
"comment": "Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-4565\n\nThe Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.",
"lastModified": "2010-01-21T00:00:00",
"organization": "Red Hat"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-310"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2025-11-21T13:09:06+00:00",
"cve": "CVE-2009-4565",
"id": "CVE-2009-4565",
"initial_release_date": "2009-12-30T00:00:00+00:00",
"product_status:fixed": "214",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "sendmail: incorrect verification of SSL certificate with NUL in name",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2009/cve-2009-4565.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-05-01T02:28:39Z",
"cve": "CVE-2009-4565",
"id": "CVE-2009-4565",
"initial_release_date": "2023-02-15T06:01:20Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2009-4565",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2009-4565.json",
"version": "6"
}
}
}
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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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