FKIE_CVE-2006-2450
Vulnerability from fkie_nvd - Published: 2006-07-18 15:40 - Updated: 2026-06-16 22:25
Severity
Summary
auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, a different issue than CVE-2006-2369.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| libvncserver | libvncserver | 0.7.1 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:libvncserver:libvncserver:0.7.1:*:*:*:*:*:*:*",
"matchCriteriaId": "AC2AED2D-3554-43A0-A7AF-9CBB383D7655",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as \"Type 1 - None\", which is accepted even if it is not offered by the server, a different issue than CVE-2006-2369."
},
{
"lang": "es",
"value": "auth.c en LibVNCServer 0.7.1 permite a atacantes remotos evitar la validaci\u00f3n a trav\u00e9s de una respuesta en la cual el cliente especifica un tipo de seguridad insegura como por ejemplo \"Tipo 1 - None\", el cual es aceptado siempre aunque no es ofrecida por el servidor, un asunto diferente que CVE-2006-2369."
}
],
"id": "CVE-2006-2450",
"lastModified": "2026-06-16T22:25:02.320",
"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": "2006-07-18T15:40:00.000",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=376824"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "http://libvncserver.cvs.sourceforge.net/libvncserver/libvncserver/libvncserver/auth.c?r1=1.11\u0026r2=1.14\u0026diff_format=u"
},
{
"source": "secalert@redhat.com",
"url": "http://seclists.org/fulldisclosure/2022/May/29"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/20940"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/21179"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/21349"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/21393"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/21405"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/24525"
},
{
"source": "secalert@redhat.com",
"url": "http://security.gentoo.org/glsa/glsa-200608-05.xml"
},
{
"source": "secalert@redhat.com",
"url": "http://security.gentoo.org/glsa/glsa-200608-12.xml"
},
{
"source": "secalert@redhat.com",
"url": "http://security.gentoo.org/glsa/glsa-200703-19.xml"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "http://sourceforge.net/project/shownotes.php?release_id=431724\u0026group_id=32584"
},
{
"source": "secalert@redhat.com",
"url": "http://www.novell.com/linux/security/advisories/2006_42_kernel.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/archive/1/442986/100/0/threaded"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/18977"
},
{
"source": "secalert@redhat.com",
"url": "http://www.vupen.com/english/advisories/2006/2797"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=376824"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "http://libvncserver.cvs.sourceforge.net/libvncserver/libvncserver/libvncserver/auth.c?r1=1.11\u0026r2=1.14\u0026diff_format=u"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://seclists.org/fulldisclosure/2022/May/29"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/20940"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/21179"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/21349"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/21393"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/21405"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/24525"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://security.gentoo.org/glsa/glsa-200608-05.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://security.gentoo.org/glsa/glsa-200608-12.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://security.gentoo.org/glsa/glsa-200703-19.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "http://sourceforge.net/project/shownotes.php?release_id=431724\u0026group_id=32584"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.novell.com/linux/security/advisories/2006_42_kernel.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/442986/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/18977"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.vupen.com/english/advisories/2006/2797"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vendorComments": [
{
"comment": "Not vulnerable. This issue does not affect the versions of LibVNCServer as distributed with Red Hat Enterprise Linux 2.1, 3, or 4.",
"lastModified": "2006-08-24T00:00:00",
"organization": "Red Hat"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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