cnvd-2015-07456
Vulnerability from cnvd
Title
MIT krb5 build_principal_va拒绝服务漏洞
Description
Kerberos是一款广泛使用的超强加密来验证客户端和服务器端的网络协议。 MIT Kerberos 5 (krb5) 1.14之前版本，lib/krb5/krb/bld_princ.c的函数build_principal_va，处理TGS请求内较长的realm字段起始位置的'\0'字符时，会造成越界读及KDC崩溃，导致拒绝服务。
Severity
中
Patch Name
MIT krb5 build_principal_va拒绝服务漏洞的补丁
Patch Description
Kerberos是一款广泛使用的超强加密来验证客户端和服务器端的网络协议。MIT Kerberos 5 (krb5) 1.14之前版本，lib/krb5/krb/bld_princ.c的函数build_principal_va，处理TGS请求内较长的realm字段起始位置的'\0'字符时，会造成越界读及KDC崩溃，导致拒绝服务。目前，厂商已经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://krbdev.mit.edu/rt/Ticket/Display.html?id=8244

Reference
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-2697
Impacted products
Name
MIT Kerberos 5 <1.14
Show details on source website

To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-2697"
    }
  },
  "description": "Kerberos\u662f\u4e00\u6b3e\u5e7f\u6cdb\u4f7f\u7528\u7684\u8d85\u5f3a\u52a0\u5bc6\u6765\u9a8c\u8bc1\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u7684\u7f51\u7edc\u534f\u8bae\u3002\r\n\r\nMIT Kerberos 5 (krb5) 1.14\u4e4b\u524d\u7248\u672c\uff0clib/krb5/krb/bld_princ.c\u7684\u51fd\u6570build_principal_va\uff0c\u5904\u7406TGS\u8bf7\u6c42\u5185\u8f83\u957f\u7684realm\u5b57\u6bb5\u8d77\u59cb\u4f4d\u7f6e\u7684\u0027\\0\u0027\u5b57\u7b26\u65f6\uff0c\u4f1a\u9020\u6210\u8d8a\u754c\u8bfb\u53caKDC\u5d29\u6e83\uff0c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "discovererName": "ghudson",
  "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://krbdev.mit.edu/rt/Ticket/Display.html?id=8244",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2015-07456",
  "openTime": "2015-11-12",
  "patchDescription": "Kerberos\u662f\u4e00\u6b3e\u5e7f\u6cdb\u4f7f\u7528\u7684\u8d85\u5f3a\u52a0\u5bc6\u6765\u9a8c\u8bc1\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u7684\u7f51\u7edc\u534f\u8bae\u3002MIT Kerberos 5 (krb5) 1.14\u4e4b\u524d\u7248\u672c\uff0clib/krb5/krb/bld_princ.c\u7684\u51fd\u6570build_principal_va\uff0c\u5904\u7406TGS\u8bf7\u6c42\u5185\u8f83\u957f\u7684realm\u5b57\u6bb5\u8d77\u59cb\u4f4d\u7f6e\u7684\u0027\\0\u0027\u5b57\u7b26\u65f6\uff0c\u4f1a\u9020\u6210\u8d8a\u754c\u8bfb\u53caKDC\u5d29\u6e83\uff0c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "MIT krb5 build_principal_va\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "MIT Kerberos 5 \u003c1.14"
  },
  "referenceLink": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-2697",
  "serverity": "\u4e2d",
  "submitTime": "2015-11-11",
  "title": "MIT krb5 build_principal_va\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}


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