cnvd - cnvd-2018-20960

cnvd-2018-20960

Vulnerability from cnvd

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:

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。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:

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

Modified

2024-08-05 09:54

Severity ?

CWE

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.

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-20181101-0001/
	https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0
	https://usn.ubuntu.com/3809-1/	vendor-advisory
	https://lists.debian.org/debian-lts-announce/2018/08/msg00022.html	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/SNWLID-2018-0011
	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/ssa-412672.pdf

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-05T09:54:03.508Z",
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            "url": "https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0"
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            "url": "http://www.openwall.com/lists/oss-security/2018/08/15/5"
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            "url": "https://www.oracle.com/security-alerts/cpujan2020.html"
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
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    "cna": {
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          "url": "https://security.netapp.com/advisory/ntap-20181101-0001/"
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          "url": "https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0"
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          "name": "USN-3809-1",
          "tags": [
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          ],
          "url": "https://usn.ubuntu.com/3809-1/"
        },
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          "name": "[debian-lts-announce] 20180821 [SECURITY] [DLA-1474-1] openssh security update",
          "tags": [
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          ],
          "url": "https://lists.debian.org/debian-lts-announce/2018/08/msg00022.html"
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          "name": "105140",
          "tags": [
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          ],
          "url": "http://www.securityfocus.com/bid/105140"
        },
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          "tags": [
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          "url": "https://www.debian.org/security/2018/dsa-4280"
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          "name": "45939",
          "tags": [
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          ],
          "url": "https://www.exploit-db.com/exploits/45939/"
        },
        {
          "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2018/08/15/5"
        },
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          "tags": [
            "vendor-advisory"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2019:0711"
        },
        {
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          "tags": [
            "vendor-advisory"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2019:2143"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpujan2020.html"
        },
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    "dateReserved": "2018-08-17T00:00:00",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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