Vulnerability-Lookup

CNVD-2020-22673

Vulnerability from cnvd - Published: 2020-04-13

Title

storeBackup符号链接攻击漏洞

Description

StoreBackup是一款用于GNU/Linux的磁盘到磁盘备份工具。 storeBackup 3.5及更早版本存在符号链接攻击漏洞。该漏洞源于storeBackup中的storeBackup.pl依赖/tmp/storeBackup.lock路径名。攻击者可利用该漏洞进行符号链接攻击，从而可提升权限。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： http://storebackup.org/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-7040

Impacted products

Name
Storebackup Storebackup <=3.5

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-7040",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-7040"
    }
  },
  "description": "StoreBackup\u662f\u4e00\u6b3e\u7528\u4e8eGNU/Linux\u7684\u78c1\u76d8\u5230\u78c1\u76d8\u5907\u4efd\u5de5\u5177\u3002\n\nstoreBackup 3.5\u53ca\u66f4\u65e9\u7248\u672c\u5b58\u5728\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8estoreBackup\u4e2d\u7684storeBackup.pl\u4f9d\u8d56/tmp/storeBackup.lock\u8def\u5f84\u540d\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8fdb\u884c\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\uff0c\u4ece\u800c\u53ef\u63d0\u5347\u6743\u9650\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttp://storebackup.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-22673",
  "openTime": "2020-04-13",
  "products": {
    "product": "Storebackup Storebackup \u003c=3.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-7040",
  "serverity": "\u4e2d",
  "submitTime": "2020-01-22",
  "title": "storeBackup\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\u6f0f\u6d1e"
}

CVE-2020-7040 (GCVE-0-2020-7040)

Vulnerability from cvelistv5 – Published: 2020-01-21 20:03 – Updated: 2024-08-04 09:18

Summary

storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

10 references

URL	Tags
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/01/20/3	x_refsource_MISC
https://seclists.org/oss-sec/2020/q1/20	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/01/21/2	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/01/22/2	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/01/22/3	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/01/23/1	mailing-listx_refsource_MLIST
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4508-1/	vendor-advisoryx_refsource_UBUNTU

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T09:18:02.843Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/01/20/3"
          },
          {
            "name": "[oss-security]  CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://seclists.org/oss-sec/2020/q1/20"
          },
          {
            "name": "[oss-security] 20200121 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/01/21/2"
          },
          {
            "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/01/22/2"
          },
          {
            "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/01/22/3"
          },
          {
            "name": "[oss-security] 20200123 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/01/23/1"
          },
          {
            "name": "openSUSE-SU-2020:0119",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00054.html"
          },
          {
            "name": "[debian-lts-announce] 20200205 [SECURITY] [DLA 2095-1] storebackup security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00003.html"
          },
          {
            "name": "USN-4508-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4508-1/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-09-17T22:06:13.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/01/20/3"
        },
        {
          "name": "[oss-security]  CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://seclists.org/oss-sec/2020/q1/20"
        },
        {
          "name": "[oss-security] 20200121 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/01/21/2"
        },
        {
          "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/01/22/2"
        },
        {
          "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/01/22/3"
        },
        {
          "name": "[oss-security] 20200123 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/01/23/1"
        },
        {
          "name": "openSUSE-SU-2020:0119",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00054.html"
        },
        {
          "name": "[debian-lts-announce] 20200205 [SECURITY] [DLA 2095-1] storebackup security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00003.html"
        },
        {
          "name": "USN-4508-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4508-1/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-7040",
          "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": "storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040",
              "refsource": "MISC",
              "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040"
            },
            {
              "name": "http://www.openwall.com/lists/oss-security/2020/01/20/3",
              "refsource": "MISC",
              "url": "http://www.openwall.com/lists/oss-security/2020/01/20/3"
            },
            {
              "name": "[oss-security]  CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
              "refsource": "MLIST",
              "url": "https://seclists.org/oss-sec/2020/q1/20"
            },
            {
              "name": "[oss-security] 20200121 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/01/21/2"
            },
            {
              "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/01/22/2"
            },
            {
              "name": "[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/01/22/3"
            },
            {
              "name": "[oss-security] 20200123 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/01/23/1"
            },
            {
              "name": "openSUSE-SU-2020:0119",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00054.html"
            },
            {
              "name": "[debian-lts-announce] 20200205 [SECURITY] [DLA 2095-1] storebackup security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00003.html"
            },
            {
              "name": "USN-4508-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4508-1/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-7040",
    "datePublished": "2020-01-21T20:03:11.000Z",
    "dateReserved": "2020-01-14T00:00:00.000Z",
    "dateUpdated": "2024-08-04T09:18:02.843Z",
    "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.