{"id":"CVE-2021-36367","state":"PUBLISHED","title":"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 se","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).","publishedAt":"2021-07-09T00:00:00.000Z","updatedAt":"2024-08-04T00:54:51.472Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html","https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa","https://www.debian.org/security/2023/dsa-5588","https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html"],"weaknesses":["CWE-345"],"ingestedAt":"2026-10-29T19:48:44.655Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/36xxx/CVE-2021-36367.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-36367","state":"PUBLISHED","datePublished":"2021-07-09T00:00:00.000Z","dateUpdated":"2024-08-04T00:54:51.472Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2021-07-09T00:00:00.000Z"},"containers":{"cna":{"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)."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html"},{"url":"https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa"},{"url":"https://www.debian.org/security/2023/dsa-5588","name":"DSA-5588","tags":["vendor-advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html","name":"[debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update","tags":["mailing-list"]}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"n/a"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2024-04-25T22:05:53.574Z"}},"adp":[{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"putty","product":"putty","defaultStatus":"unknown","versions":[{"version":"-","status":"affected","lessThanOrEqual":"0.75","versionType":"custom"}],"cpes":["cpe:2.3:a:putty:putty:-:*:*:*:*:*:*:*"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.1,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-36367","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2024-02-22T20:07:50.029818Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","type":"CWE","description":"CWE-345 Insufficient Verification of Data Authenticity"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-04T17:13:16.563Z"}},{"title":"CVE Program Container","references":[{"url":"https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html","tags":["x_transferred"]},{"url":"https://git.tartarus.org/?p=simon/putty.git%3Ba=commit%3Bh=1dc5659aa62848f0aeb5de7bd3839fecc7debefa","tags":["x_transferred"]},{"url":"https://www.debian.org/security/2023/dsa-5588","name":"DSA-5588","tags":["vendor-advisory","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html","name":"[debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update","tags":["mailing-list","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T00:54:51.472Z"}}]}}}