fkie_cve-2015-5600
Vulnerability from fkie_nvd
Published
2015-08-03 01:59
Modified
2024-11-21 02:33
Severity ?
Summary
The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.
References
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*",
"matchCriteriaId": "27C9A807-7740-4D75-9B01-91ED53D14C40",
"versionEndIncluding": "6.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list."
},
{
"lang": "es",
"value": "Vulnerabilidad en la funci\u00f3n kbdint_next_device en auth2-chall.c en sshd en OpenSSH hasta la versi\u00f3n 6.9, no restringe correctamente el procesamiento de dispositivos de teclado interactivo con una \u00fanica conexi\u00f3n, lo cual facilita a atacantes remotos ejecutar un ataque de fuerza bruta o causar una denegaci\u00f3n de servicio (mediante el consumo de la CPU) a trav\u00e9s de una lista larga y redundante en la opci\u00f3n ssh -oKbdInteractiveDevices, seg\u00fan lo demostrado por una modificaci\u00f3n en el cliente que provee una contrase\u00f1a diferente para cada uno de los elementos pam de la lista."
}
],
"id": "CVE-2015-5600",
"lastModified": "2024-11-21T02:33:22.290",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 8.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 7.8,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2015-08-03T01:59:03.950",
"references": [
{
"source": "cve@mitre.org",
"url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c"
},
{
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},
{
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"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10697"
},
{
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"url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html"
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"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
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"url": "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"
},
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"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"
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"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"
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},
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"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10157"
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"url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c"
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"url": "http://www.securityfocus.com/bid/75990"
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"url": "http://www.securityfocus.com/bid/91787"
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"url": "http://www.securityfocus.com/bid/92012"
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],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-264"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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