Vulnerability-Lookup

CNVD-2020-13876

Vulnerability from cnvd - Published: 2020-02-27

Title

LTSP LDM权限提升漏洞

Description

LTSP是一个著名的Linux终端服务器项目程序，为Linux服务器加入瘦客户端支持。 LTSP LDM存在权限提升漏洞，具有特定权限的攻击者可通过对带有可预测名称的文件实施符号链接攻击利用该漏洞获取权限。

Severity

高

Formal description

目前厂商未提供修复方案，请关注厂商主页： https://wiki.debian.org/LTSP

Reference

https://www.debian.org/security/2020/dsa-4601 https://security-tracker.debian.org/tracker/CVE-2019-20373

Impacted products

Name
LTSP LDM

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-20373",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-20373"
    }
  },
  "description": "LTSP\u662f\u4e00\u4e2a\u8457\u540d\u7684Linux\u7ec8\u7aef\u670d\u52a1\u5668\u9879\u76ee\u7a0b\u5e8f\uff0c\u4e3aLinux\u670d\u52a1\u5668\u52a0\u5165\u7626\u5ba2\u6237\u7aef\u652f\u6301\u3002\n\nLTSP LDM\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u5177\u6709\u7279\u5b9a\u6743\u9650\u7684\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5bf9\u5e26\u6709\u53ef\u9884\u6d4b\u540d\u79f0\u7684\u6587\u4ef6\u5b9e\u65bd\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u672a\u63d0\u4f9b\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://wiki.debian.org/LTSP",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-13876",
  "openTime": "2020-02-27",
  "products": {
    "product": "LTSP LDM"
  },
  "referenceLink": "https://www.debian.org/security/2020/dsa-4601 https://security-tracker.debian.org/tracker/CVE-2019-20373",
  "serverity": "\u9ad8",
  "submitTime": "2020-01-13",
  "title": "LTSP LDM\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2019-20373 (GCVE-0-2019-20373)

Vulnerability from cvelistv5 – Published: 2020-01-09 22:27 – Updated: 2024-08-05 02:39

Summary

LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://git.launchpad.net/~ltsp-upstream/ltsp/+gi…	x_refsource_MISC
https://www.debian.org/security/2020/dsa-4601	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:39:09.776Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba"
          },
          {
            "name": "DSA-4601",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4601"
          },
          {
            "name": "[debian-lts-announce] 20200110 [SECURITY] [DLA 2064-1] ldm security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user\u0027s shell lacks support for Bourne shell syntax. This is related to a run-x-session script."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-01-11T10:06:06.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba"
        },
        {
          "name": "DSA-4601",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2020/dsa-4601"
        },
        {
          "name": "[debian-lts-announce] 20200110 [SECURITY] [DLA 2064-1] ldm security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-20373",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user\u0027s shell lacks support for Bourne shell syntax. This is related to a run-x-session script."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba",
              "refsource": "MISC",
              "url": "https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba"
            },
            {
              "name": "DSA-4601",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020/dsa-4601"
            },
            {
              "name": "[debian-lts-announce] 20200110 [SECURITY] [DLA 2064-1] ldm security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-20373",
    "datePublished": "2020-01-09T22:27:55.000Z",
    "dateReserved": "2020-01-09T00:00:00.000Z",
    "dateUpdated": "2024-08-05T02:39:09.776Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2020-13876

CVE-2019-20373 (GCVE-0-2019-20373)

Tags

Sightings

Nomenclature

Related by attack behaviour