cnvd-2016-04653
Vulnerability from cnvd
Title
Samba libcli/smb/smbXcli_base.c安全机制绕过漏洞
Description
Samba是在Linux和UNIX系统上实现SMB协议的一个免费软件，由服务器及客户端程序构成。 Samba (4.0.0 － 4.4.4) libcli/smb/smbXcli_base.c在实现上存在安全漏洞，中间人攻击者通过SMB2_SESSION_FLAG_IS_GUEST或SMB2_SESSION_FLAG_IS_NULL标志，可绕过客户端签名保护机制，然后欺骗SMB2及SMB3服务器。
Severity
中
Patch Name
Samba libcli/smb/smbXcli_base.c安全机制绕过漏洞的补丁
Patch Description
Samba是在Linux和UNIX系统上实现SMB协议的一个免费软件，由服务器及客户端程序构成。 Samba (4.0.0 － 4.4.4) libcli/smb/smbXcli_base.c在实现上存在安全漏洞，中间人攻击者通过SMB2_SESSION_FLAG_IS_GUEST或SMB2_SESSION_FLAG_IS_NULL标志，可绕过客户端签名保护机制，然后欺骗SMB2及SMB3服务器。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： https://www.samba.org/samba/security/

Reference
https://www.samba.org/samba/security/CVE-2016-2119.html
Impacted products
Name
Samba Samba >=4.0.0，<=4.4.4
Show details on source website

To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "91700"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-2119"
    }
  },
  "description": "Samba\u662f\u5728Linux\u548cUNIX\u7cfb\u7edf\u4e0a\u5b9e\u73b0SMB\u534f\u8bae\u7684\u4e00\u4e2a\u514d\u8d39\u8f6f\u4ef6\uff0c\u7531\u670d\u52a1\u5668\u53ca\u5ba2\u6237\u7aef\u7a0b\u5e8f\u6784\u6210\u3002\r\n\r\nSamba (4.0.0 \uff0d 4.4.4) libcli/smb/smbXcli_base.c\u5728\u5b9e\u73b0\u4e0a\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u4e2d\u95f4\u4eba\u653b\u51fb\u8005\u901a\u8fc7SMB2_SESSION_FLAG_IS_GUEST\u6216SMB2_SESSION_FLAG_IS_NULL\u6807\u5fd7\uff0c\u53ef\u7ed5\u8fc7\u5ba2\u6237\u7aef\u7b7e\u540d\u4fdd\u62a4\u673a\u5236\uff0c\u7136\u540e\u6b3a\u9a97SMB2\u53caSMB3\u670d\u52a1\u5668\u3002",
  "discovererName": "Stefan Metzmacher",
  "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\nhttps://www.samba.org/samba/security/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-04653",
  "openTime": "2016-07-11",
  "patchDescription": "Samba\u662f\u5728Linux\u548cUNIX\u7cfb\u7edf\u4e0a\u5b9e\u73b0SMB\u534f\u8bae\u7684\u4e00\u4e2a\u514d\u8d39\u8f6f\u4ef6\uff0c\u7531\u670d\u52a1\u5668\u53ca\u5ba2\u6237\u7aef\u7a0b\u5e8f\u6784\u6210\u3002\r\n\r\nSamba (4.0.0 \uff0d 4.4.4) libcli/smb/smbXcli_base.c\u5728\u5b9e\u73b0\u4e0a\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u4e2d\u95f4\u4eba\u653b\u51fb\u8005\u901a\u8fc7SMB2_SESSION_FLAG_IS_GUEST\u6216SMB2_SESSION_FLAG_IS_NULL\u6807\u5fd7\uff0c\u53ef\u7ed5\u8fc7\u5ba2\u6237\u7aef\u7b7e\u540d\u4fdd\u62a4\u673a\u5236\uff0c\u7136\u540e\u6b3a\u9a97SMB2\u53caSMB3\u670d\u52a1\u5668\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": "Samba libcli/smb/smbXcli_base.c\u5b89\u5168\u673a\u5236\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Samba Samba \u003e=4.0.0\uff0c\u003c=4.4.4"
  },
  "referenceLink": "https://www.samba.org/samba/security/CVE-2016-2119.html",
  "serverity": "\u4e2d",
  "submitTime": "2016-07-08",
  "title": "Samba libcli/smb/smbXcli_base.c\u5b89\u5168\u673a\u5236\u7ed5\u8fc7\u6f0f\u6d1e"
}


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