github - ghsa-jcxc-5f87-vq5m

ghsa-jcxc-5f87-vq5m

Vulnerability from github

Published

2022-05-24 17:02

Modified

2022-05-24 17:02

Severity ?

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

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-18276"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-273"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-11-28T01:15:00Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-jcxc-5f87-vq5m",
  "modified": "2022-05-24T17:02:24Z",
  "published": "2022-05-24T17:02:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-18276"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202105-34"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200430-0003"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.youtube.com/watch?v=-wGtxJ8opa8"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2019-18276

Vulnerability from cvelistv5

Published

2019-11-28 00:27

Modified

2024-08-05 01:47

Severity ?

Summary

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

Version: n/a

Show details on NVD website

JSON

To clipboard

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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.

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