Vulnerability-Lookup

CNVD-2020-40489

Vulnerability from cnvd - Published: 2020-07-16

Title

systemd输入验证错误漏洞

Description

systemd是德国Lennart Poettering软件开发者的一款基于Linux的系统和服务管理器。该产品兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd v245及之前版本中存在安全漏洞，该漏洞源于程序没有正确处理带有数字的用户名。目前没有详细漏洞细节提供。

Severity

中

Patch Name

systemd输入验证错误漏洞的补丁

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://github.com/0x2b3bfa0/systemd/commit/06e86e55b43625e957c3db5b129fc2ec1767954d

Reference

https://security.netapp.com/advisory/ntap-20200611-0003/

Impacted products

Name
systemd systemd <=v245

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-13776",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-13776"
    }
  },
  "description": "systemd\u662f\u5fb7\u56fdLennart Poettering\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u548c\u670d\u52a1\u7ba1\u7406\u5668\u3002\u8be5\u4ea7\u54c1\u517c\u5bb9\u4e86SysV\u548cLSB\u7684\u542f\u52a8\u811a\u672c\uff0c\u4e14\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7528\u6765\u8868\u793a\u7cfb\u7edf\u670d\u52a1\u95f4\u4f9d\u8d56\u5173\u7cfb\u7684\u6846\u67b6\u3002\n\nsystemd v245\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6ca1\u6709\u6b63\u786e\u5904\u7406\u5e26\u6709\u6570\u5b57\u7684\u7528\u6237\u540d\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1ahttps://github.com/0x2b3bfa0/systemd/commit/06e86e55b43625e957c3db5b129fc2ec1767954d",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-40489",
  "openTime": "2020-07-16",
  "patchDescription": "systemd\u662f\u5fb7\u56fdLennart Poettering\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u548c\u670d\u52a1\u7ba1\u7406\u5668\u3002\u8be5\u4ea7\u54c1\u517c\u5bb9\u4e86SysV\u548cLSB\u7684\u542f\u52a8\u811a\u672c\uff0c\u4e14\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7528\u6765\u8868\u793a\u7cfb\u7edf\u670d\u52a1\u95f4\u4f9d\u8d56\u5173\u7cfb\u7684\u6846\u67b6\u3002\r\n\r\nsystemd v245\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u6ca1\u6709\u6b63\u786e\u5904\u7406\u5e26\u6709\u6570\u5b57\u7684\u7528\u6237\u540d\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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": "systemd\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "systemd systemd \u003c=v245"
  },
  "referenceLink": "https://security.netapp.com/advisory/ntap-20200611-0003/",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-16",
  "title": "systemd\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-13776 (GCVE-0-2020-13776)

Vulnerability from cvelistv5 – Published: 2020-06-03 02:05 – Updated: 2025-06-09 15:46

Summary

systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082.

Severity

6.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 15:45 UTC

CWE

n/a
CWE-269 - Improper Privilege Management

Assigner

mitre mitre root Scorecard

References

3 references

URL	Tags
https://github.com/systemd/systemd/issues/15985	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020061…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Show details on NVD website

JSON

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        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:25:16.521Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/systemd/systemd/issues/15985"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200611-0003/"
          },
          {
            "name": "FEDORA-2020-2faf839786",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IYGLFEKG45EYBJ7TPQMLWROWPTZBEU63/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-13776",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T15:45:10.428817Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "problemTypes": [
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                "lang": "en",
                "type": "CWE"
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            ]
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T15:46:14.046Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082."
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      "problemTypes": [
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        },
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          "url": "https://security.netapp.com/advisory/ntap-20200611-0003/"
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          ],
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        }
      ],
      "x_legacyV4Record": {
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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-2020-40489

CVE-2020-13776 (GCVE-0-2020-13776)

Tags

Sightings

Nomenclature

Related by attack behaviour