cnvd - cnvd-2019-45162

cnvd-2019-45162

Vulnerability from cnvd

Title: Bash权限提升漏洞

Description:

Bash是美国布莱恩-福克斯（Brian J. Fox）软件开发者的一款为GNU计划而编写的、运行于类Unix操作系统中的Shell（命令语言解释器）。它能够从标准输入设备或文件中读取、执行命令。

Bash 5.0 patch 11及之前版本中的shell.c文件的disable_priv_mode存在安全漏洞。攻击者可利用该漏洞获取权限。

Severity: 高

Formal description:

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法： https://www.gnu.org/software/bash

Reference: https://www.exploitalert.com/view-details.html?id=34517 https://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html

Impacted products

Name
Bash Bash 5.0 Patch 11

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-18276"
    }
  },
  "description": "Bash\u662f\u7f8e\u56fd\u5e03\u83b1\u6069-\u798f\u514b\u65af\uff08Brian J. Fox\uff09\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u4e3aGNU\u8ba1\u5212\u800c\u7f16\u5199\u7684\u3001\u8fd0\u884c\u4e8e\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684Shell\uff08\u547d\u4ee4\u8bed\u8a00\u89e3\u91ca\u5668\uff09\u3002\u5b83\u80fd\u591f\u4ece\u6807\u51c6\u8f93\u5165\u8bbe\u5907\u6216\u6587\u4ef6\u4e2d\u8bfb\u53d6\u3001\u6267\u884c\u547d\u4ee4\u3002\n\nBash 5.0 patch 11\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u7684shell.c\u6587\u4ef6\u7684disable_priv_mode\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\nhttps://www.gnu.org/software/bash",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-45162",
  "openTime": "2019-12-13",
  "products": {
    "product": "Bash Bash 5.0 Patch 11"
  },
  "referenceLink": "https://www.exploitalert.com/view-details.html?id=34517\r\nhttps://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html",
  "serverity": "\u9ad8",
  "submitTime": "2019-12-03",
  "title": "Bash\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2019-18276 (GCVE-0-2019-18276)

Vulnerability from cvelistv5

Published

2019-11-28 00:27

Modified

2025-06-09 15:51

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

Summary

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

References

▼	URL	Tags
	https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E	mailing-list, x_refsource_MLIST
	https://security.gentoo.org/glsa/202105-34	vendor-advisory, x_refsource_GENTOO
	https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
	https://www.youtube.com/watch?v=-wGtxJ8opa8	x_refsource_MISC
	https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff	x_refsource_CONFIRM
	http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-20200430-0003/	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T01:47:14.188Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
          },
          {
            "name": "GLSA-202105-34",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202105-34"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.youtube.com/watch?v=-wGtxJ8opa8"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200430-0003/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2019-18276",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T15:50:29.163562Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-273",
                "description": "CWE-273 Improper Check for Dropped Privileges",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T15:51:35.168Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support \"saved UID\" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use \"enable -f\" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-04-19T23:20:34.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
        },
        {
          "name": "GLSA-202105-34",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202105-34"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.youtube.com/watch?v=-wGtxJ8opa8"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20200430-0003/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-18276",
          "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": "An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support \"saved UID\" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use \"enable -f\" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"
            },
            {
              "name": "GLSA-202105-34",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202105-34"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
              "name": "https://www.youtube.com/watch?v=-wGtxJ8opa8",
              "refsource": "MISC",
              "url": "https://www.youtube.com/watch?v=-wGtxJ8opa8"
            },
            {
              "name": "https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff",
              "refsource": "CONFIRM",
              "url": "https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff"
            },
            {
              "name": "http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200430-0003/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20200430-0003/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-18276",
    "datePublished": "2019-11-28T00:27:51.000Z",
    "dateReserved": "2019-10-23T00:00:00.000Z",
    "dateUpdated": "2025-06-09T15:51:35.168Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted