Vulnerability-Lookup

CNVD-2019-45162

Vulnerability from cnvd - Published: 2019-12-13

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

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-18276"
    }
  },
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  "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 – Updated: 2025-06-09 15:51

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.

Severity

7.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 15:50 UTC

CWE

n/a
CWE-273 - Improper Check for Dropped Privileges

Assigner

mitre mitre root Scorecard

References

7 references

URL	Tags
https://lists.apache.org/thread.html/rf9fa47ab664…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202105-34	vendor-advisoryx_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/951bdaad7a1…	x_refsource_CONFIRM
http://packetstormsecurity.com/files/155498/Bash-…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020043…	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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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.

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.

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CNVD-2019-45162

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

Tags

Sightings

Nomenclature

Related by attack behaviour