2023-04-24 12:24:31 +02:00
{
"id" : "CVE-2020-27632" ,
"sourceIdentifier" : "cve@mitre.org" ,
"published" : "2021-03-10T18:15:12.797" ,
2024-12-08 03:06:42 +00:00
"lastModified" : "2024-11-21T05:21:32.823" ,
2023-10-10 18:00:28 +00:00
"vulnStatus" : "Modified" ,
2024-07-14 02:06:08 +00:00
"cveTags" : [ ] ,
2023-04-24 12:24:31 +02:00
"descriptions" : [
{
"lang" : "en" ,
"value" : "In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions."
} ,
{
"lang" : "es" ,
"value" : "En la familia SIMATIC MV400 versiones anteriores a la v7.0.6, el generador ISN es inicializado con un valor constante y presenta incrementos constantes. Un atacante podr\u00eda predecir y secuestrar sesiones de TCP"
}
] ,
"metrics" : {
"cvssMetricV31" : [
{
"source" : "nvd@nist.gov" ,
"type" : "Primary" ,
"cvssData" : {
"version" : "3.1" ,
"vectorString" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" ,
2024-12-08 03:06:42 +00:00
"baseScore" : 7.5 ,
"baseSeverity" : "HIGH" ,
2023-04-24 12:24:31 +02:00
"attackVector" : "NETWORK" ,
"attackComplexity" : "LOW" ,
"privilegesRequired" : "NONE" ,
"userInteraction" : "NONE" ,
"scope" : "UNCHANGED" ,
"confidentialityImpact" : "NONE" ,
"integrityImpact" : "HIGH" ,
2024-12-08 03:06:42 +00:00
"availabilityImpact" : "NONE"
2023-04-24 12:24:31 +02:00
} ,
"exploitabilityScore" : 3.9 ,
"impactScore" : 3.6
}
] ,
"cvssMetricV2" : [
{
"source" : "nvd@nist.gov" ,
"type" : "Primary" ,
"cvssData" : {
"version" : "2.0" ,
"vectorString" : "AV:N/AC:L/Au:N/C:N/I:P/A:N" ,
2024-12-08 03:06:42 +00:00
"baseScore" : 5.0 ,
2023-04-24 12:24:31 +02:00
"accessVector" : "NETWORK" ,
"accessComplexity" : "LOW" ,
"authentication" : "NONE" ,
"confidentialityImpact" : "NONE" ,
"integrityImpact" : "PARTIAL" ,
2024-12-08 03:06:42 +00:00
"availabilityImpact" : "NONE"
2023-04-24 12:24:31 +02:00
} ,
"baseSeverity" : "MEDIUM" ,
"exploitabilityScore" : 10.0 ,
"impactScore" : 2.9 ,
"acInsufInfo" : false ,
"obtainAllPrivilege" : false ,
"obtainUserPrivilege" : false ,
"obtainOtherPrivilege" : false ,
"userInteractionRequired" : false
}
]
} ,
"weaknesses" : [
{
"source" : "nvd@nist.gov" ,
"type" : "Primary" ,
"description" : [
{
"lang" : "en" ,
"value" : "NVD-CWE-noinfo"
}
]
}
] ,
"configurations" : [
{
"operator" : "AND" ,
"nodes" : [
{
"operator" : "OR" ,
"negate" : false ,
"cpeMatch" : [
{
2024-12-08 03:06:42 +00:00
"vulnerable" : true ,
"criteria" : "cpe:2.3:o:siemens:simatic_mv420_firmware:*:*:*:*:*:*:*:*" ,
"versionEndExcluding" : "7.0.6" ,
"matchCriteriaId" : "AA65BD0C-3249-4AB6-A066-C55ADC06EDB7"
2023-04-24 12:24:31 +02:00
}
]
} ,
{
"operator" : "OR" ,
"negate" : false ,
"cpeMatch" : [
{
2024-12-08 03:06:42 +00:00
"vulnerable" : false ,
"criteria" : "cpe:2.3:h:siemens:simatic_mv420:-:*:*:*:*:*:*:*" ,
"matchCriteriaId" : "79B15C1B-2510-434B-A589-5903CA0C00EE"
2023-04-24 12:24:31 +02:00
}
]
}
]
} ,
{
"operator" : "AND" ,
"nodes" : [
{
"operator" : "OR" ,
"negate" : false ,
"cpeMatch" : [
{
2024-12-08 03:06:42 +00:00
"vulnerable" : true ,
"criteria" : "cpe:2.3:o:siemens:simatic_mv440_firmware:*:*:*:*:*:*:*:*" ,
"versionEndExcluding" : "7.0.6" ,
"matchCriteriaId" : "2FCC833E-AA77-471E-87CA-40B5E354163F"
2023-04-24 12:24:31 +02:00
}
]
} ,
{
"operator" : "OR" ,
"negate" : false ,
"cpeMatch" : [
{
2024-12-08 03:06:42 +00:00
"vulnerable" : false ,
"criteria" : "cpe:2.3:h:siemens:simatic_mv440:-:*:*:*:*:*:*:*" ,
"matchCriteriaId" : "6408042E-7E06-4AED-9853-29B176EDFE9F"
2023-04-24 12:24:31 +02:00
}
]
}
]
}
] ,
"references" : [
{
"url" : "https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf" ,
"source" : "cve@mitre.org" ,
"tags" : [
"Vendor Advisory"
]
2023-10-10 18:00:28 +00:00
} ,
{
"url" : "https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01" ,
"source" : "cve@mitre.org"
} ,
{
"url" : "https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/" ,
"source" : "cve@mitre.org"
2024-12-08 03:06:42 +00:00
} ,
{
"url" : "https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf" ,
"source" : "af854a3a-2127-422b-91ae-364da2661108" ,
"tags" : [
"Vendor Advisory"
]
} ,
{
"url" : "https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01" ,
"source" : "af854a3a-2127-422b-91ae-364da2661108"
} ,
{
"url" : "https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/" ,
"source" : "af854a3a-2127-422b-91ae-364da2661108"
2023-04-24 12:24:31 +02:00
}
]
}