Vulnerability-Lookup

CNVD-2017-05009

Vulnerability from cnvd - Published: 2017-04-22

Title

Back In Time竞争条件漏洞

Description

Back In Time（又名backintime）是一套Linux备份工具。 Back In Time 1.1.18及之前的版本中的serviceHelper.py文件的‘_checkPolkitPrivilege’函数存在竞争条件漏洞。攻击者可利用该漏洞替换用户的请求进程。

Severity

高

Patch Name

Back In Time竞争条件漏洞的补丁

Patch Description

Back In Time（又名backintime）是一套Linux备份工具。 Back In Time 1.1.18及之前的版本中的serviceHelper.py文件的‘_checkPolkitPrivilege’函数存在竞争条件漏洞。攻击者可利用该漏洞替换用户的请求进程。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

目前厂商已经发布了升级补丁以修复此安全问题，补丁获取链接： https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869

Reference

https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869

Impacted products

Name
backintime backintime <=1.1.18

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-7572",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7572"
    }
  },
  "description": "Back In Time\uff08\u53c8\u540dbackintime\uff09\u662f\u4e00\u5957Linux\u5907\u4efd\u5de5\u5177\u3002\r\n\r\nBack In Time 1.1.18\u53ca\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7684serviceHelper.py\u6587\u4ef6\u7684\u2018_checkPolkitPrivilege\u2019\u51fd\u6570\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u66ff\u6362\u7528\u6237\u7684\u8bf7\u6c42\u8fdb\u7a0b\u3002",
  "discovererName": "unknown",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-05009",
  "openTime": "2017-04-22",
  "patchDescription": "Back In Time\uff08\u53c8\u540dbackintime\uff09\u662f\u4e00\u5957Linux\u5907\u4efd\u5de5\u5177\u3002\r\n\r\nBack In Time 1.1.18\u53ca\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7684serviceHelper.py\u6587\u4ef6\u7684\u2018_checkPolkitPrivilege\u2019\u51fd\u6570\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u66ff\u6362\u7528\u6237\u7684\u8bf7\u6c42\u8fdb\u7a0b\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": "Back In Time\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "backintime backintime \u003c=1.1.18"
  },
  "referenceLink": "https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869",
  "serverity": "\u9ad8",
  "submitTime": "2017-04-18",
  "title": "Back In Time\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e"
}

CVE-2017-7572 (GCVE-0-2017-7572)

Vulnerability from cvelistv5 – Published: 2017-04-06 18:00 – Updated: 2024-09-16 16:32

Summary

The _checkPolkitPrivilege function in serviceHelper.py in Back In Time (aka backintime) 1.1.18 and earlier uses a deprecated polkit authorization method (unix-process) that is subject to a race condition (time of check, time of use). With this authorization method, the owner of a process requesting a polkit operation is checked by polkitd via /proc/<pid>/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

https://github.com/bit-team/backintime/commit/7f2…

x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T16:04:11.981Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The _checkPolkitPrivilege function in serviceHelper.py in Back In Time (aka backintime) 1.1.18 and earlier uses a deprecated polkit authorization method (unix-process) that is subject to a race condition (time of check, time of use). With this authorization method, the owner of a process requesting a polkit operation is checked by polkitd via /proc/\u003cpid\u003e/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2017-04-06T18:00:00Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2017-7572",
          "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": "The _checkPolkitPrivilege function in serviceHelper.py in Back In Time (aka backintime) 1.1.18 and earlier uses a deprecated polkit authorization method (unix-process) that is subject to a race condition (time of check, time of use). With this authorization method, the owner of a process requesting a polkit operation is checked by polkitd via /proc/\u003cpid\u003e/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869",
              "refsource": "MISC",
              "url": "https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2017-7572",
    "datePublished": "2017-04-06T18:00:00Z",
    "dateReserved": "2017-04-06T00:00:00Z",
    "dateUpdated": "2024-09-16T16:32:59.625Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CNVD-2017-05009

CVE-2017-7572 (GCVE-0-2017-7572)

Tags

Sightings

Nomenclature