Vulnerability-Lookup

CNVD-2016-05349

Vulnerability from cnvd - Published: 2016-07-25

Title

OpenSSH用户枚举漏洞

Description

OpenSSH（OpenBSD Secure Shell）是OpenBSD计划组所维护的一套用于安全访问远程计算机的连接工具。 OpenSSH存在用户枚举漏洞。OpenSSH SSH守护进程允许用户进行身份验证时的时间差进行用户枚举。

Severity

中

Patch Name

OpenSSH用户枚举漏洞的补丁

Patch Description

OpenSSH（OpenBSD Secure Shell）是OpenBSD计划组所维护的一套用于安全访问远程计算机的连接工具。 OpenSSH存在用户枚举漏洞。OpenSSH SSH守护进程允许用户进行身份验证时的时间差进行用户枚举。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

厂商已发布了修复版本，请及时关注更新： http://www.openssh.com/

Reference

https://www.debian.org/security/2016/dsa-3626 http://seclists.org/fulldisclosure/2016/Jul/51

Impacted products

Name
OpenSSH OpenSSH

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "91812"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-6210"
    }
  },
  "description": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\r\n\r\nOpenSSH\u5b58\u5728\u7528\u6237\u679a\u4e3e\u6f0f\u6d1e\u3002OpenSSH SSH\u5b88\u62a4\u8fdb\u7a0b\u5141\u8bb8\u7528\u6237\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u65f6\u7684\u65f6\u95f4\u5dee\u8fdb\u884c\u7528\u6237\u679a\u4e3e\u3002",
  "discovererName": "Shi Lei",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u4fee\u590d\u7248\u672c\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttp://www.openssh.com/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-05349",
  "openTime": "2016-07-25",
  "patchDescription": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\r\n\r\nOpenSSH\u5b58\u5728\u7528\u6237\u679a\u4e3e\u6f0f\u6d1e\u3002OpenSSH SSH\u5b88\u62a4\u8fdb\u7a0b\u5141\u8bb8\u7528\u6237\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u65f6\u7684\u65f6\u95f4\u5dee\u8fdb\u884c\u7528\u6237\u679a\u4e3e\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": "OpenSSH\u7528\u6237\u679a\u4e3e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "OpenSSH OpenSSH"
  },
  "referenceLink": "https://www.debian.org/security/2016/dsa-3626\r\nhttp://seclists.org/fulldisclosure/2016/Jul/51",
  "serverity": "\u4e2d",
  "submitTime": "2016-07-25",
  "title": "OpenSSH\u7528\u6237\u679a\u4e3e\u6f0f\u6d1e"
}

CVE-2016-6210 (GCVE-0-2016-6210)

Vulnerability from cvelistv5 – Published: 2017-02-13 00:00 – Updated: 2026-05-29 20:17

Summary

sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.

Severity

5.9 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 20:17 UTC

CWE

n/a
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

mitre mitre root

References

12 references

URL	Tags
https://access.redhat.com/errata/RHSA-2017:2563	vendor-advisory
http://www.securitytracker.com/id/1036319	vdb-entry
http://seclists.org/fulldisclosure/2016/Jul/51	mailing-list
http://www.debian.org/security/2016/dsa-3626	vendor-advisory
https://www.exploit-db.com/exploits/40136/	exploit
https://www.exploit-db.com/exploits/40113/	exploit
https://www.openssh.com/txt/release-7.3
https://security.gentoo.org/glsa/201612-18	vendor-advisory
https://access.redhat.com/errata/RHSA-2017:2029	vendor-advisory
http://www.securityfocus.com/bid/91812	vdb-entry
https://security.netapp.com/advisory/ntap-2019020…
https://cert-portal.siemens.com/productcert/pdf/s…

Date Public

2016-07-14 00:00

Show details on NVD website

JSON

To clipboard

{
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          "dateUpdated": "2024-08-06T01:22:20.650Z",
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          {
            "name": "RHSA-2017:2563",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2017:2563"
          },
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            "url": "http://www.securitytracker.com/id/1036319"
          },
          {
            "name": "20160714 opensshd - user enumeration",
            "tags": [
              "mailing-list",
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            ],
            "url": "http://seclists.org/fulldisclosure/2016/Jul/51"
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            "name": "DSA-3626",
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          {
            "tags": [
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            "url": "https://www.openssh.com/txt/release-7.3"
          },
          {
            "name": "GLSA-201612-18",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201612-18"
          },
          {
            "name": "RHSA-2017:2029",
            "tags": [
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            ],
            "url": "https://access.redhat.com/errata/RHSA-2017:2029"
          },
          {
            "name": "91812",
            "tags": [
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            "url": "http://www.securityfocus.com/bid/91812"
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            ],
            "url": "https://security.netapp.com/advisory/ntap-20190206-0001/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2016-6210",
                "options": [
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                  },
                  {
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-29T20:17:34.559558Z",
                "version": "2.0.3"
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        {
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          ],
          "url": "http://www.securitytracker.com/id/1036319"
        },
        {
          "name": "20160714 opensshd - user enumeration",
          "tags": [
            "mailing-list"
          ],
          "url": "http://seclists.org/fulldisclosure/2016/Jul/51"
        },
        {
          "name": "DSA-3626",
          "tags": [
            "vendor-advisory"
          ],
          "url": "http://www.debian.org/security/2016/dsa-3626"
        },
        {
          "name": "40136",
          "tags": [
            "exploit"
          ],
          "url": "https://www.exploit-db.com/exploits/40136/"
        },
        {
          "name": "40113",
          "tags": [
            "exploit"
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          "url": "https://www.exploit-db.com/exploits/40113/"
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          "tags": [
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          ],
          "url": "https://security.gentoo.org/glsa/201612-18"
        },
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          "tags": [
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          "url": "https://access.redhat.com/errata/RHSA-2017:2029"
        },
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          "tags": [
            "vdb-entry"
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          "url": "http://www.securityfocus.com/bid/91812"
        },
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          "url": "https://security.netapp.com/advisory/ntap-20190206-0001/"
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    "dateUpdated": "2026-05-29T20:17:40.496Z",
    "state": "PUBLISHED"
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}

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.