FKIE_CVE-2006-4925
Vulnerability from fkie_nvd - Published: 2006-09-29 00:07 - Updated: 2026-06-16 22:30
Severity
Summary
packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL.
References
{
"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:openbsd:openssh:4.5:*:*:*:*:*:*:*",
"matchCriteriaId": "9B72CFB3-39C7-469C-AA59-69F5B8993BF7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL."
},
{
"lang": "es",
"value": "packet.c en ssh en OpenSSH permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) mediante el env\u00edo de una secuencia de protocolo inv\u00e1lida con USERAUTH_SUCCESS antes de NEWKEYS, lo que provoca que newkeys[mode] sea nulo (NULL)."
}
],
"id": "CVE-2006-4925",
"lastModified": "2026-06-16T22:30:09.057",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2006-09-29T00:07:00.000",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Exploit",
"Patch"
],
"url": "http://bugs.gentoo.org/show_bug.cgi?id=148228"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/22245"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/22298"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/22495"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/23038"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDKSA-2006:179"
},
{
"source": "secalert@redhat.com",
"url": "http://www.novell.com/linux/security/advisories/2006_24_sr.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.novell.com/linux/security/advisories/2006_62_openssh.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/packet.c.diff?r1=1.144\u0026r2=1.145\u0026f=h"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/archive/1/447153/100/0/threaded"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/archive/1/447861/100/200/threaded"
},
{
"source": "secalert@redhat.com",
"url": "https://issues.rpath.com/browse/RPL-661"
},
{
"source": "secalert@redhat.com",
"url": "https://issues.rpath.com/browse/RPL-681"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Patch"
],
"url": "http://bugs.gentoo.org/show_bug.cgi?id=148228"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/22245"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/22298"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/22495"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/23038"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.mandriva.com/security/advisories?name=MDKSA-2006:179"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.novell.com/linux/security/advisories/2006_24_sr.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.novell.com/linux/security/advisories/2006_62_openssh.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/packet.c.diff?r1=1.144\u0026r2=1.145\u0026f=h"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/447153/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/447861/100/200/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://issues.rpath.com/browse/RPL-661"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://issues.rpath.com/browse/RPL-681"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vendorComments": [
{
"comment": "Red Hat does not consider this flaw a security issue. This flaw can cause an OpenSSH client to crash when connecting to a malicious server, which does not result in a denial of service condition.",
"lastModified": "2006-10-31T00:00:00",
"organization": "Red Hat"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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