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CNVD-2015-05115

Vulnerability from cnvd - Published: 2015-08-05
VLAI
Title
OpenSSH sshd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。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 6.9及之前版本的sshd中的auth2-chall.c文件中的‘kbdint_next_device’函数存在安全漏洞。远程攻击者利用该漏洞可借助ssh -oKbdInteractiveDevices选项中较长且重复的列表实施暴力破解攻击，或造成拒绝服务（CPU消耗）。
Severity
高
Patch Name
OpenSSH sshd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。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 6.9及之前版本的sshd中的auth2-chall.c文件中的‘kbdint_next_device’函数存在安全漏洞。远程攻击者利用该漏洞可借助ssh -oKbdInteractiveDevices选项中较长且重复的列表实施暴力破解攻击，或造成拒绝服务（CPU消耗）。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

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c

Reference
http://seclists.org/fulldisclosure/2015/Jul/92 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-5600
Impacted products
Name
Openssh OpenSSH <6.9
Show details on source website
To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "75990"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-5600"
    }
  },
  "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 6.9\u53ca\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684auth2-chall.c\u6587\u4ef6\u4e2d\u7684\u2018kbdint_next_device\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u501f\u52a9ssh -oKbdInteractiveDevices\u9009\u9879\u4e2d\u8f83\u957f\u4e14\u91cd\u590d\u7684\u5217\u8868\u5b9e\u65bd\u66b4\u529b\u7834\u89e3\u653b\u51fb\uff0c\u6216\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08CPU\u6d88\u8017\uff09\u3002",
  "discovererName": "unknown",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttp://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2015-05115",
  "openTime": "2015-08-05",
  "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 6.9\u53ca\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684auth2-chall.c\u6587\u4ef6\u4e2d\u7684\u2018kbdint_next_device\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u501f\u52a9ssh -oKbdInteractiveDevices\u9009\u9879\u4e2d\u8f83\u957f\u4e14\u91cd\u590d\u7684\u5217\u8868\u5b9e\u65bd\u66b4\u529b\u7834\u89e3\u653b\u51fb\uff0c\u6216\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08CPU\u6d88\u8017\uff09\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 sshd\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Openssh OpenSSH  \u003c6.9"
  },
  "referenceLink": "http://seclists.org/fulldisclosure/2015/Jul/92\r\nhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-5600",
  "serverity": "\u9ad8",
  "submitTime": "2015-08-04",
  "title": "OpenSSH sshd\u6f0f\u6d1e"
}



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