cve-2016-20012
Vulnerability from cvelistv5
Published
2021-09-15 19:32
Modified
2024-08-06 03:47
Severity ?
EPSS score ?
Summary
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
References
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This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product", }, ], problemTypes: [ { descriptions: [ { description: "n/a", lang: "en", type: "text", }, ], }, ], providerMetadata: { dateUpdated: "2022-02-22T22:24:33", orgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca", shortName: "mitre", }, references: [ { tags: [ "x_refsource_MISC", ], url: "https://github.com/openssh/openssh-portable/pull/270", }, { tags: [ "x_refsource_MISC", ], url: "https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265", }, { tags: [ "x_refsource_MISC", ], url: "https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak", }, { tags: [ "x_refsource_MISC", ], url: "https://rushter.com/blog/public-ssh-keys/", }, { tags: [ "x_refsource_CONFIRM", ], url: "https://security.netapp.com/advisory/ntap-20211014-0005/", }, { tags: [ "x_refsource_MISC", ], url: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097", }, { tags: [ "x_refsource_MISC", ], url: "https://www.openwall.com/lists/oss-security/2018/08/24/1", }, { tags: [ "x_refsource_MISC", ], url: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185", }, ], tags: [ "disputed", ], x_legacyV4Record: { CVE_data_meta: { ASSIGNER: "cve@mitre.org", ID: "CVE-2016-20012", 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: "** DISPUTED ** OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product.", }, ], }, problemtype: { problemtype_data: [ { description: [ { lang: "eng", value: "n/a", }, ], }, ], }, references: { reference_data: [ { name: "https://github.com/openssh/openssh-portable/pull/270", refsource: "MISC", url: "https://github.com/openssh/openssh-portable/pull/270", }, { name: "https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265", refsource: "MISC", url: "https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265", }, { name: "https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak", refsource: "MISC", url: "https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak", }, { name: "https://rushter.com/blog/public-ssh-keys/", refsource: "MISC", url: "https://rushter.com/blog/public-ssh-keys/", }, { name: "https://security.netapp.com/advisory/ntap-20211014-0005/", refsource: "CONFIRM", url: "https://security.netapp.com/advisory/ntap-20211014-0005/", }, { name: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097", refsource: "MISC", url: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-920577097", }, { name: "https://www.openwall.com/lists/oss-security/2018/08/24/1", refsource: "MISC", url: "https://www.openwall.com/lists/oss-security/2018/08/24/1", }, { name: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185", refsource: "MISC", url: "https://github.com/openssh/openssh-portable/pull/270#issuecomment-943909185", }, ], }, }, }, }, cveMetadata: { assignerOrgId: "8254265b-2729-46b6-b9e3-3dfca2d5bfca", assignerShortName: "mitre", cveId: "CVE-2016-20012", datePublished: "2021-09-15T19:32:11", dateReserved: "2021-09-15T00:00:00", dateUpdated: "2024-08-06T03:47:34.948Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { nvd: "{\"cve\":{\"id\":\"CVE-2016-20012\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2021-09-15T20:15:07.310\",\"lastModified\":\"2024-11-21T02:47:33.240\",\"vulnStatus\":\"Modified\",\"cveTags\":[{\"sourceIdentifier\":\"cve@mitre.org\",\"tags\":[\"disputed\"]}],\"descriptions\":[{\"lang\":\"en\",\"value\":\"OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. 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Sightings
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Nomenclature
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