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 sesión SSH incluso si nunca ha enviado una respuesta de autenticación sustantiva. Esto facilita a un servidor SSH controlado por un atacante presentar una petición de autenticación 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
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Nomenclature
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