Vulnerability-Lookup

CNVD-2021-59139

Vulnerability from cnvd - Published: 2021-08-06

Title

PuTTY数据伪造问题漏洞

Description

PuTTY是Simon Tatham个人开发者的一套免费的Telnet、Rlogin和SSH客户端软件。该软件主要用于对Linux系统进行远程管理。 PuTTY存在数据伪造问题漏洞，攻击者可利用该漏洞导致控制的SSH服务器更容易在稍后提供欺骗身份验证提示。

Severity

中

Patch Name

PuTTY数据伪造问题漏洞的补丁

Patch Description

PuTTY是Simon Tatham个人开发者的一套免费的Telnet、Rlogin和SSH客户端软件。该软件主要用于对Linux系统进行远程管理。 PuTTY存在数据伪造问题漏洞，攻击者可利用该漏洞导致控制的SSH服务器更容易在稍后提供欺骗身份验证提示。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-36367

Impacted products

Name
putty putty <0.75

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-36367"
    }
  },
  "description": "PuTTY\u662fSimon Tatham\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u5957\u514d\u8d39\u7684Telnet\u3001Rlogin\u548cSSH\u5ba2\u6237\u7aef\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u4e3b\u8981\u7528\u4e8e\u5bf9Linux\u7cfb\u7edf\u8fdb\u884c\u8fdc\u7a0b\u7ba1\u7406\u3002\n\nPuTTY\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u63a7\u5236\u7684SSH\u670d\u52a1\u5668\u66f4\u5bb9\u6613\u5728\u7a0d\u540e\u63d0\u4f9b\u6b3a\u9a97\u8eab\u4efd\u9a8c\u8bc1\u63d0\u793a\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-59139",
  "openTime": "2021-08-06",
  "patchDescription": "PuTTY\u662fSimon Tatham\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u5957\u514d\u8d39\u7684Telnet\u3001Rlogin\u548cSSH\u5ba2\u6237\u7aef\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u4e3b\u8981\u7528\u4e8e\u5bf9Linux\u7cfb\u7edf\u8fdb\u884c\u8fdc\u7a0b\u7ba1\u7406\u3002\r\n\r\nPuTTY\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u63a7\u5236\u7684SSH\u670d\u52a1\u5668\u66f4\u5bb9\u6613\u5728\u7a0d\u540e\u63d0\u4f9b\u6b3a\u9a97\u8eab\u4efd\u9a8c\u8bc1\u63d0\u793a\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "PuTTY\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "putty putty \u003c0.75"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-36367",
  "serverity": "\u4e2d",
  "submitTime": "2021-07-13",
  "title": "PuTTY\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2021-36367 (GCVE-0-2021-36367)

Vulnerability from cvelistv5 – Published: 2021-07-09 00:00 – Updated: 2024-08-04 00:54

Summary

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).

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-02-22 20:07 UTC

CWE

n/a
CWE-345 - Insufficient Verification of Data Authenticity

Assigner

mitre mitre root

References

4 references

URL	Tags
https://www.chiark.greenend.org.uk/~sgtatham/putt…
https://git.tartarus.org/?p=simon/putty.git%3Ba=c…
https://www.debian.org/security/2023/dsa-5588	vendor-advisory
https://lists.debian.org/debian-lts-announce/2024…	mailing-list

Impacted products

1 product

Vendor	Product	Version
putty	putty	Affected: - , ≤ 0.75 (custom) cpe:2.3:a:putty:putty:-:::::::*

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:putty:putty:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "putty",
            "vendor": "putty",
            "versions": [
              {
                "lessThanOrEqual": "0.75",
                "status": "affected",
                "version": "-",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-36367",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-02-22T20:07:50.029818Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-345",
                "description": "CWE-345 Insufficient Verification of Data Authenticity",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:13:16.563Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:54:51.472Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "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"
          },
          {
            "name": "DSA-5588",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5588"
          },
          {
            "name": "[debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "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)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-04-25T22:05:53.574Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "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"
        },
        {
          "name": "DSA-5588",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2023/dsa-5588"
        },
        {
          "name": "[debian-lts-announce] 20240425 [SECURITY] [DLA 3794-1] putty security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-36367",
    "datePublished": "2021-07-09T00:00:00.000Z",
    "dateReserved": "2021-07-09T00:00:00.000Z",
    "dateUpdated": "2024-08-04T00:54:51.472Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CNVD-2021-59139

CVE-2021-36367 (GCVE-0-2021-36367)

Tags

Sightings

Nomenclature

Related by attack behaviour