gsd-2021-36367
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-36367",
"description": "PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).",
"id": "GSD-2021-36367",
"references": [
"https://security.archlinux.org/CVE-2021-36367"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-36367"
],
"details": "PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).",
"id": "GSD-2021-36367",
"modified": "2023-12-13T01:23:16.948192Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2021-36367",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "n/a",
"version": {
"version_data": [
{
"version_value": "n/a"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user)."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html",
"refsource": "MISC",
"url": "https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html"
},
{
"name": "https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa",
"refsource": "MISC",
"url": "https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa"
},
{
"name": "DSA-5588",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2023/dsa-5588"
},
{
"name": "[debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html"
}
]
}
},
"nvd.nist.gov": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1159EB89-B30E-4381-8879-B40F5C935B62",
"versionEndIncluding": "0.75",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user)."
},
{
"lang": "es",
"value": "PuTTY versiones hasta 0.75, procede con establecer una sesi\u00f3n SSH incluso si nunca ha enviado una respuesta de autenticaci\u00f3n sustantiva. Esto facilita a un servidor SSH controlado por un atacante presentar una petici\u00f3n de autenticaci\u00f3n falsa posterior (que el atacante puede usar para capturar los datos de las credenciales, y usar esos datos para fines no deseados por el usuario cliente)"
}
],
"id": "CVE-2021-36367",
"lastModified": "2024-04-25T22:15:07.883",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.2,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-07-09T21:15:08.540",
"references": [
{
"source": "cve@mitre.org",
"url": "https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa"
},
{
"source": "cve@mitre.org",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Release Notes",
"Third Party Advisory"
],
"url": "https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html"
},
{
"source": "cve@mitre.org",
"url": "https://www.debian.org/security/2023/dsa-5588"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-345"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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