cnvd - cnvd-2020-21469

CNVD-2020-21469

Vulnerability from cnvd - Published: 2020-04-05

Title

Apport权限提升漏洞

Description

Apport是一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Apport中存在权限提升漏洞，该漏洞源于为创建的lock文件分配了安全的权限。本地攻击者可通过实施符号链接攻击利用该漏洞提升权限。

Severity

中

Patch Name

Apport权限提升漏洞的补丁

Patch Description

Apport是一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Apport中存在权限提升漏洞，该漏洞源于为创建的lock文件分配了安全的权限。本地攻击者可通过实施符号链接攻击利用该漏洞提升权限。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://usn.ubuntu.com/4315-1/

Reference

https://packetstormsecurity.com/files/157062/Ubuntu-Security-Notice-USN-4315-1.html

Impacted products

Name
Apport Apport 无

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-8831",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-8831"
    }
  },
  "description": "Apport\u662f\u4e00\u6b3e\u7528\u4e8e\u6536\u96c6\u5e76\u53cd\u9988\u9519\u8bef\u4fe1\u606f\uff08\u5f53\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u65f6\u64cd\u4f5c\u7cfb\u7edf\u8ba4\u4e3a\u6709\u7528\u7684\u4fe1\u606f\uff09\u7684\u5de5\u5177\u5305\u3002\n\nApport\u4e2d\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4e3a\u521b\u5efa\u7684lock\u6587\u4ef6\u5206\u914d\u4e86\u5b89\u5168\u7684\u6743\u9650\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5b9e\u65bd\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u5347\u6743\u9650\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://usn.ubuntu.com/4315-1/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-21469",
  "openTime": "2020-04-05",
  "patchDescription": "Apport\u662f\u4e00\u6b3e\u7528\u4e8e\u6536\u96c6\u5e76\u53cd\u9988\u9519\u8bef\u4fe1\u606f\uff08\u5f53\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u65f6\u64cd\u4f5c\u7cfb\u7edf\u8ba4\u4e3a\u6709\u7528\u7684\u4fe1\u606f\uff09\u7684\u5de5\u5177\u5305\u3002\r\n\r\nApport\u4e2d\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4e3a\u521b\u5efa\u7684lock\u6587\u4ef6\u5206\u914d\u4e86\u5b89\u5168\u7684\u6743\u9650\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5b9e\u65bd\u7b26\u53f7\u94fe\u63a5\u653b\u51fb\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u5347\u6743\u9650\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": "Apport\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Apport Apport \u65e0"
  },
  "referenceLink": "https://packetstormsecurity.com/files/157062/Ubuntu-Security-Notice-USN-4315-1.html",
  "serverity": "\u4e2d",
  "submitTime": "2020-04-04",
  "title": "Apport\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2020-8831 (GCVE-0-2020-8831)

Vulnerability from cvelistv5 – Published: 2020-04-22 21:15 – Updated: 2024-09-16 19:00

Summary

Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport's lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.

Severity ?

6.5 (Medium)


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

CWE

CWE-379 - Creation of Temporary File in Directory with Incorrect Permissions

Assigner

canonical

References

URL

Tags

	https://launchpad.net/bugs/1862348	x_refsource_CONFIRM
	https://usn.ubuntu.com/4315-1/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4315-2/	vendor-advisoryx_refsource_UBUNTU

Impacted products

	Vendor	Product	Version
	Canonical	Apport	Affected: 2.20.1 , < 2.20.1-0ubuntu2.23 (custom) Affected: 2.20.9 , < 2.20.9-0ubuntu7.14 (custom) Affected: 2.20.11 , < 2.20.11-0ubuntu8.8 (custom)

Credits

Maximilien Bourgeteau

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T10:12:10.889Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://launchpad.net/bugs/1862348"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4315-1/"
          },
          {
            "name": "USN-4315-2",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4315-2/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apport",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "2.20.1-0ubuntu2.23",
              "status": "affected",
              "version": "2.20.1",
              "versionType": "custom"
            },
            {
              "lessThan": "2.20.9-0ubuntu7.14",
              "status": "affected",
              "version": "2.20.9",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "2.20.11-0ubuntu22",
                  "status": "unaffected"
                }
              ],
              "lessThan": "2.20.11-0ubuntu8.8",
              "status": "affected",
              "version": "2.20.11",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Maximilien Bourgeteau"
        }
      ],
      "datePublic": "2020-04-02T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport\u0027s lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-379",
              "description": "CWE-379 Creation of Temporary File in Directory with Incorrect Permissions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-06-24T20:06:02",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://launchpad.net/bugs/1862348"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://usn.ubuntu.com/4315-1/"
        },
        {
          "name": "USN-4315-2",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4315-2/"
        }
      ],
      "source": {
        "advisory": "https://usn.ubuntu.com/4315-1/",
        "defect": [
          "https://launchpad.net/bugs/1862348"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "World writable root owned lock file created in user controllable location",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "AKA": "",
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2020-04-02T03:04:00.000Z",
          "ID": "CVE-2020-8831",
          "STATE": "PUBLIC",
          "TITLE": "World writable root owned lock file created in user controllable location"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Apport",
                      "version": {
                        "version_data": [
                          {
                            "platform": "",
                            "version_affected": "\u003c",
                            "version_name": "2.20.1",
                            "version_value": "2.20.1-0ubuntu2.23"
                          },
                          {
                            "platform": "",
                            "version_affected": "\u003c",
                            "version_name": "2.20.9",
                            "version_value": "2.20.9-0ubuntu7.14"
                          },
                          {
                            "platform": "",
                            "version_affected": "\u003c",
                            "version_name": "2.20.11",
                            "version_value": "2.20.11-0ubuntu8.8"
                          },
                          {
                            "platform": "",
                            "version_affected": "\u003c",
                            "version_name": "2.20.11",
                            "version_value": "2.20.11-0ubuntu22"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Canonical"
              }
            ]
          }
        },
        "configuration": [],
        "credit": [
          {
            "lang": "eng",
            "value": "Maximilien Bourgeteau"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport\u0027s lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22."
            }
          ]
        },
        "exploit": [],
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-379 Creation of Temporary File in Directory with Incorrect Permissions"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://launchpad.net/bugs/1862348",
              "refsource": "CONFIRM",
              "url": "https://launchpad.net/bugs/1862348"
            },
            {
              "name": "https://usn.ubuntu.com/4315-1/",
              "refsource": "CONFIRM",
              "url": "https://usn.ubuntu.com/4315-1/"
            },
            {
              "name": "USN-4315-2",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4315-2/"
            }
          ]
        },
        "solution": [],
        "source": {
          "advisory": "https://usn.ubuntu.com/4315-1/",
          "defect": [
            "https://launchpad.net/bugs/1862348"
          ],
          "discovery": "EXTERNAL"
        },
        "work_around": []
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2020-8831",
    "datePublished": "2020-04-22T21:15:18.418314Z",
    "dateReserved": "2020-02-10T00:00:00",
    "dateUpdated": "2024-09-16T19:00:55.009Z",
    "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-2020-21469

CVE-2020-8831 (GCVE-0-2020-8831)

Tags

Sightings

Nomenclature