Vulnerability-Lookup

CNVD-2015-07456

Vulnerability from cnvd - Published: 2015-11-12

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

JSON

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"
}

CVE-2015-2697 (GCVE-0-2015-2697)

Vulnerability from cvelistv5 – Published: 2015-11-09 02:00 – Updated: 2024-08-06 05:24

Summary

The build_principal_va function in lib/krb5/krb/bld_princ.c in MIT Kerberos 5 (aka krb5) before 1.14 allows remote authenticated users to cause a denial of service (out-of-bounds read and KDC crash) via an initial '\0' character in a long realm field within a TGS request.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2339 records in the last 180 days details

References

11 references

URL	Tags
https://github.com/krb5/krb5/commit/f0c094a1b745d…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/77581	vdb-entryx_refsource_BID
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/201611-14	vendor-advisoryx_refsource_GENTOO
http://www.securitytracker.com/id/1034084	vdb-entryx_refsource_SECTRACK
http://www.oracle.com/technetwork/topics/security…	x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8252	x_refsource_CONFIRM
http://www.debian.org/security/2015/dsa-3395	vendor-advisoryx_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-2810-1	vendor-advisoryx_refsource_UBUNTU

Date Public

2015-10-26 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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