Vulnerability-Lookup

CNVD-2018-20960

Vulnerability from cnvd - Published: 2018-10-15

Title

OpenSSH用户枚举漏洞（CNVD-2018-20960）

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。该工具是SSH协议的开源实现，支持对所有的传输进行加密，可有效阻止窃听、连接劫持以及其他网络级的攻击。 OpenSSH 7.7及之前版本中存在安全漏洞，该漏洞源于程序会对有效的和无效的身份验证请求发出不同的响应。攻击者可通过发送特制的请求利用该漏洞枚举用户名称。

Severity

中

Patch Name

OpenSSH用户枚举漏洞（CNVD-2018-20960）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0

Reference

https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0

Impacted products

Name
Openbsd OpenSSH <=7.7

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "105140"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-15473",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15473"
    }
  },
  "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\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002\r\n\r\nOpenSSH 7.7\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u4f1a\u5bf9\u6709\u6548\u7684\u548c\u65e0\u6548\u7684\u8eab\u4efd\u9a8c\u8bc1\u8bf7\u6c42\u53d1\u51fa\u4e0d\u540c\u7684\u54cd\u5e94\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u7279\u5236\u7684\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u7528\u6237\u540d\u79f0\u3002",
  "discovererName": "OpenSSH",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-20960",
  "openTime": "2018-10-15",
  "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\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002\r\n\r\nOpenSSH 7.7\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u4f1a\u5bf9\u6709\u6548\u7684\u548c\u65e0\u6548\u7684\u8eab\u4efd\u9a8c\u8bc1\u8bf7\u6c42\u53d1\u51fa\u4e0d\u540c\u7684\u54cd\u5e94\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u7279\u5236\u7684\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u7528\u6237\u540d\u79f0\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\uff08CNVD-2018-20960\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Openbsd OpenSSH \u003c=7.7"
  },
  "referenceLink": "https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0",
  "serverity": "\u4e2d",
  "submitTime": "2018-08-21",
  "title": "OpenSSH\u7528\u6237\u679a\u4e3e\u6f0f\u6d1e\uff08CNVD-2018-20960\uff09"
}

CVE-2018-15473 (GCVE-0-2018-15473)

Vulnerability from cvelistv5 – Published: 2018-08-17 00:00 – Updated: 2025-12-17 21:22

Summary

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

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 2025-12-17 21:22 UTC

CWE

n/a
CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

mitre mitre root Scorecard

References

18 references

URL	Tags
https://security.gentoo.org/glsa/201810-03	vendor-advisory
http://www.securitytracker.com/id/1041487	vdb-entry
https://www.exploit-db.com/exploits/45233/	exploit
https://bugs.debian.org/906236
https://www.exploit-db.com/exploits/45210/	exploit
https://security.netapp.com/advisory/ntap-2018110…
https://github.com/openbsd/src/commit/779974d35b4…
https://usn.ubuntu.com/3809-1/	vendor-advisory
https://lists.debian.org/debian-lts-announce/2018…	mailing-list
http://www.securityfocus.com/bid/105140	vdb-entry
https://www.debian.org/security/2018/dsa-4280	vendor-advisory
https://www.exploit-db.com/exploits/45939/	exploit
https://psirt.global.sonicwall.com/vuln-detail/SN…
http://www.openwall.com/lists/oss-security/2018/08/15/5
https://access.redhat.com/errata/RHSA-2019:0711	vendor-advisory
https://access.redhat.com/errata/RHSA-2019:2143	vendor-advisory
https://www.oracle.com/security-alerts/cpujan2020.html
https://cert-portal.siemens.com/productcert/pdf/s…

Date Public

2018-08-17 00:00

Show details on NVD website

JSON

To clipboard

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          "tags": [
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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.

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

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Action not permitted

CNVD-2018-20960

CVE-2018-15473 (GCVE-0-2018-15473)

Tags

Sightings

Nomenclature

Related by attack behaviour