Vulnerability-Lookup

CNVD-2021-28710

Vulnerability from cnvd - Published: 2021-04-15

Title

Samba内存损坏漏洞

Description

Samba是Samba团队的一套可使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。 Samba存在安全漏洞，攻击者可利用该漏洞通过DN Strings触发内存损坏，从而触发拒绝服务，并可能运行代码。

Severity

高

Patch Name

Samba内存损坏漏洞的补丁

Patch Description

Samba是Samba团队的一套可使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。 Samba存在安全漏洞，攻击者可利用该漏洞通过DN Strings触发内存损坏，从而触发拒绝服务，并可能运行代码。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

厂商已发布了漏洞修复程序，请及时关注更新： https://www.samba.org/samba/security/CVE-2020-27840.html

Reference

https://access.redhat.com/security/cve/cve-2020-27840

Impacted products

Name
Samba Samba null

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-27840",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-27840"
    }
  },
  "description": "Samba\u662fSamba\u56e2\u961f\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\u3002\n\nSamba\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7DN Strings\u89e6\u53d1\u5185\u5b58\u635f\u574f\uff0c\u4ece\u800c\u89e6\u53d1\u62d2\u7edd\u670d\u52a1\uff0c\u5e76\u53ef\u80fd\u8fd0\u884c\u4ee3\u7801\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.samba.org/samba/security/CVE-2020-27840.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-28710",
  "openTime": "2021-04-15",
  "patchDescription": "Samba\u662fSamba\u56e2\u961f\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\u3002\r\n\r\nSamba\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7DN Strings\u89e6\u53d1\u5185\u5b58\u635f\u574f\uff0c\u4ece\u800c\u89e6\u53d1\u62d2\u7edd\u670d\u52a1\uff0c\u5e76\u53ef\u80fd\u8fd0\u884c\u4ee3\u7801\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\u5185\u5b58\u635f\u574f\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Samba Samba null"
  },
  "referenceLink": "https://access.redhat.com/security/cve/cve-2020-27840",
  "serverity": "\u9ad8",
  "submitTime": "2021-03-26",
  "title": "Samba\u5185\u5b58\u635f\u574f\u6f0f\u6d1e"
}

CVE-2020-27840 (GCVE-0-2020-27840)

Vulnerability from cvelistv5 – Published: 2021-05-12 14:06 – Updated: 2024-08-04 16:25

Summary

A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.

Severity

No CVSS data available.

CWE

CWE-125

Assigner

redhat redhat root

References

9 references

URL	Tags
https://security.netapp.com/advisory/ntap-2021032…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4884	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://bugzilla.redhat.com/show_bug.cgi?id=1941400	x_refsource_MISC
https://www.samba.org/samba/security/CVE-2020-278…	x_refsource_MISC
https://security.gentoo.org/glsa/202105-22	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
n/a	samba	Affected: samba 4.14.1, samba 4.13.6, samba 4.12.13

Show details on NVD website

JSON

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          },
          {
            "name": "[debian-lts-announce] 20210331 [SECURITY] [DLA 2611-1] ldb security update",
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            "url": "https://www.debian.org/security/2021/dsa-4884"
          },
          {
            "name": "FEDORA-2021-1a8e93a285",
            "tags": [
              "vendor-advisory",
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/"
          },
          {
            "name": "FEDORA-2021-c93a3a5d3f",
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        },
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          "url": "https://www.samba.org/samba/security/CVE-2020-27840.html"
        },
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          "tags": [
            "vendor-advisory",
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    "state": "PUBLISHED"
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  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

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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CNVD-2021-28710

CVE-2020-27840 (GCVE-0-2020-27840)

Tags

Sightings

Nomenclature

Related by attack behaviour