Vulnerability-Lookup

CNVD-2018-24256

Vulnerability from cnvd - Published: 2018-11-29

Title

Samba AD DC LDAP服务器拒绝服务漏洞

Description

Samba是Samba团队开发的一套可使UNIX系列的操作系统与微软Windows操作系统的SMB/CIFS网络协议做连结的自由软件。该软件支持共享打印机、互相传输资料文件等。AD DC LDAP Server是其中的一个轻量级目录访问服务器。 Samba 4.0.0及之后版本中的AD DC LDAP服务器存在安全漏洞。远程攻击者可利用该漏洞造成拒绝服务（崩溃）。

Severity

中

Patch Name

Samba AD DC LDAP服务器拒绝服务漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接: https://www.samba.org/samba/security/CVE-2018-16851.html

Reference

https://packetstormsecurity.com/files/150482/Ubuntu-Security-Notice-USN-3827-1.html

Impacted products

Name
Samba Samba <=4.0.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-16851"
    }
  },
  "description": "Samba\u662fSamba\u56e2\u961f\u5f00\u53d1\u7684\u4e00\u5957\u53ef\u4f7fUNIX\u7cfb\u5217\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e0e\u5fae\u8f6fWindows\u64cd\u4f5c\u7cfb\u7edf\u7684SMB/CIFS\u7f51\u7edc\u534f\u8bae\u505a\u8fde\u7ed3\u7684\u81ea\u7531\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u652f\u6301\u5171\u4eab\u6253\u5370\u673a\u3001\u4e92\u76f8\u4f20\u8f93\u8d44\u6599\u6587\u4ef6\u7b49\u3002AD DC LDAP Server\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u76ee\u5f55\u8bbf\u95ee\u670d\u52a1\u5668\u3002\n\nSamba 4.0.0\u53ca\u4e4b\u540e\u7248\u672c\u4e2d\u7684AD DC LDAP\u670d\u52a1\u5668\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5d29\u6e83\uff09\u3002",
  "discovererName": "Laura Pardo",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5:\r\nhttps://www.samba.org/samba/security/CVE-2018-16851.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-24256",
  "openTime": "2018-11-29",
  "patchDescription": "Samba\u662fSamba\u56e2\u961f\u5f00\u53d1\u7684\u4e00\u5957\u53ef\u4f7fUNIX\u7cfb\u5217\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e0e\u5fae\u8f6fWindows\u64cd\u4f5c\u7cfb\u7edf\u7684SMB/CIFS\u7f51\u7edc\u534f\u8bae\u505a\u8fde\u7ed3\u7684\u81ea\u7531\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u652f\u6301\u5171\u4eab\u6253\u5370\u673a\u3001\u4e92\u76f8\u4f20\u8f93\u8d44\u6599\u6587\u4ef6\u7b49\u3002AD DC LDAP Server\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u76ee\u5f55\u8bbf\u95ee\u670d\u52a1\u5668\u3002\r\n\r\nSamba 4.0.0\u53ca\u4e4b\u540e\u7248\u672c\u4e2d\u7684AD DC LDAP\u670d\u52a1\u5668\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5d29\u6e83\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": "Samba AD DC LDAP\u670d\u52a1\u5668\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Samba Samba \u003c=4.0.0"
  },
  "referenceLink": "https://packetstormsecurity.com/files/150482/Ubuntu-Security-Notice-USN-3827-1.html",
  "serverity": "\u4e2d",
  "submitTime": "2018-11-28",
  "title": "Samba AD DC LDAP\u670d\u52a1\u5668\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2018-16851 (GCVE-0-2018-16851)

Vulnerability from cvelistv5 – Published: 2018-11-28 14:00 – Updated: 2024-08-05 10:32

Summary

Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.

Severity

6.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-476

Assigner

redhat redhat root

References

9 references

URL	Tags
http://www.securityfocus.com/bid/106027	vdb-entryx_refsource_BID
https://usn.ubuntu.com/3827-2/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3827-1/	vendor-advisoryx_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-2018112…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2018…	mailing-listx_refsource_MLIST
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://www.debian.org/security/2018/dsa-4345	vendor-advisoryx_refsource_DEBIAN
https://www.samba.org/samba/security/CVE-2018-168…	x_refsource_CONFIRM
https://security.gentoo.org/glsa/202003-52	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
[UNKNOWN]	samba	Affected: 4.7.12 Affected: 4.8.7 Affected: 4.9.3

Date Public

2018-11-27 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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CNVD-2018-24256

CVE-2018-16851 (GCVE-0-2018-16851)

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