CNVD-2015-05761

Vulnerability from cnvd - Published: 2015-09-01
VLAI
Title
OpenSSH sshd monitor组件输入验证漏洞
Description
OpenSSH(OpenBSD Secure Shell)on non-OpenBSD platforms是OpenBSD计划组所维护的一套运行于非OpenBSD(基于BSD的UNIX实现)平台且用于安全访问远程计算机的连接工具。 基于non-OpenBSD平台的OpenSSH 6.9及之前版本的sshd中的monitor组件中存在安全漏洞,该漏洞源于程序错误的接收MONITOR_REQ_PAM_INIT_CTX请求中的外部用户名数据。本地攻击者可通过SSH登录访问并控制sshd uid向MONITOR_REQ_PWNAM发送特制的请求,利用该漏洞实施伪造攻击。
Severity
低
Patch Name
OpenSSH sshd monitor组件输入验证漏洞的补丁
Patch Description
OpenSSH(OpenBSD Secure Shell)on non-OpenBSD platforms是OpenBSD计划组所维护的一套运行于非OpenBSD(基于BSD的UNIX实现)平台且用于安全访问远程计算机的连接工具。基于non-OpenBSD平台的OpenSSH 6.9及之前版本的sshd中的monitor组件中存在安全漏洞,该漏洞源于程序错误的接收MONITOR_REQ_PAM_INIT_CTX请求中的外部用户名数据。本地攻击者可通过SSH登录访问并控制sshd uid向MONITOR_REQ_PWNAM发送特制的请求,利用该漏洞实施伪造攻击。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此安全问题,补丁获取链接: http://www.openssh.com/txt/release-7.0

Reference
http://www.openwall.com/lists/oss-security/2015/08/22/1 http://seclists.org/fulldisclosure/2015/Aug/54
Impacted products
Name
Openssh OpenSSH <=6.9
Show details on source website

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-6563"
    }
  },
  "description": "OpenSSH\uff08OpenBSD Secure Shell\uff09on non-OpenBSD platforms\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u8fd0\u884c\u4e8e\u975eOpenBSD\uff08\u57fa\u4e8eBSD\u7684UNIX\u5b9e\u73b0\uff09\u5e73\u53f0\u4e14\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\r\n\r\n\u57fa\u4e8enon-OpenBSD\u5e73\u53f0\u7684OpenSSH 6.9\u53ca\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684monitor\u7ec4\u4ef6\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u9519\u8bef\u7684\u63a5\u6536MONITOR_REQ_PAM_INIT_CTX\u8bf7\u6c42\u4e2d\u7684\u5916\u90e8\u7528\u6237\u540d\u6570\u636e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7SSH\u767b\u5f55\u8bbf\u95ee\u5e76\u63a7\u5236sshd uid\u5411MONITOR_REQ_PWNAM\u53d1\u9001\u7279\u5236\u7684\u8bf7\u6c42\uff0c\u5229\u7528\u8be5\u6f0f\u6d1e\u5b9e\u65bd\u4f2a\u9020\u653b\u51fb\u3002",
  "discovererName": "OpenSSH",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttp://www.openssh.com/txt/release-7.0",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2015-05761",
  "openTime": "2015-09-01",
  "patchDescription": "OpenSSH\uff08OpenBSD Secure Shell\uff09on non-OpenBSD platforms\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u8fd0\u884c\u4e8e\u975eOpenBSD\uff08\u57fa\u4e8eBSD\u7684UNIX\u5b9e\u73b0\uff09\u5e73\u53f0\u4e14\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u57fa\u4e8enon-OpenBSD\u5e73\u53f0\u7684OpenSSH 6.9\u53ca\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684monitor\u7ec4\u4ef6\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u9519\u8bef\u7684\u63a5\u6536MONITOR_REQ_PAM_INIT_CTX\u8bf7\u6c42\u4e2d\u7684\u5916\u90e8\u7528\u6237\u540d\u6570\u636e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7SSH\u767b\u5f55\u8bbf\u95ee\u5e76\u63a7\u5236sshd uid\u5411MONITOR_REQ_PWNAM\u53d1\u9001\u7279\u5236\u7684\u8bf7\u6c42\uff0c\u5229\u7528\u8be5\u6f0f\u6d1e\u5b9e\u65bd\u4f2a\u9020\u653b\u51fb\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 monitor\u7ec4\u4ef6\u8f93\u5165\u9a8c\u8bc1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Openssh OpenSSH  \u003c=6.9"
  },
  "referenceLink": "http://www.openwall.com/lists/oss-security/2015/08/22/1\r\nhttp://seclists.org/fulldisclosure/2015/Aug/54",
  "serverity": "\u4f4e",
  "submitTime": "2015-08-25",
  "title": "OpenSSH sshd monitor\u7ec4\u4ef6\u8f93\u5165\u9a8c\u8bc1\u6f0f\u6d1e"
}



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