GHSA-HF9H-VV4M-2F33

Vulnerability from github – Published: 2023-03-10 21:30 – Updated: 2024-01-05 13:23
VLAI?
Summary
Incorrect Authorization in Jenkins Core
Details

Jenkins creates a temporary file when a plugin is uploaded from an administrator’s computer.

Jenkins 2.393 and earlier, LTS 2.375.3 and earlier, and prior to LTS 2.387.1 creates this temporary file in the system temporary directory with the default permissions for newly created files.

If these permissions are overly permissive, they may allow attackers with access to the Jenkins controller file system to read and write the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.

This vulnerability only affects operating systems using a shared temporary directory for all users (typically Linux). Additionally, the default permissions for newly created files generally only allows attackers to read the temporary file. Jenkins 2.394, LTS 2.375.4, and LTS 2.387.1 creates the temporary file with more restrictive permissions.

As a workaround, you can set a different path as your default temporary directory using the Java system property java.io.tmpdir, if you’re concerned about this issue but unable to immediately update Jenkins.

Severity ?
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.376"
            },
            {
              "fixed": "2.387.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.375.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.388"
            },
            {
              "fixed": "2.394"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-27899"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-17T14:45:00Z",
    "nvd_published_at": "2023-03-10T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "Jenkins creates a temporary file when a plugin is uploaded from an administrator\u2019s computer.\n\nJenkins 2.393 and earlier, LTS 2.375.3 and earlier, and prior to LTS 2.387.1 creates this temporary file in the system temporary directory with the default permissions for newly created files.\n\nIf these permissions are overly permissive, they may allow attackers with access to the Jenkins controller file system to read and write the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.\n\nThis vulnerability only affects operating systems using a shared temporary directory for all users (typically Linux). Additionally, the default permissions for newly created files generally only allows attackers to read the temporary file.\nJenkins 2.394, LTS 2.375.4, and LTS 2.387.1 creates the temporary file with more restrictive permissions.\n\nAs a workaround, you can set a different path as your default temporary directory using the Java system property java.io.tmpdir, if you\u2019re concerned about this issue but unable to immediately update Jenkins.",
  "id": "GHSA-hf9h-vv4m-2f33",
  "modified": "2024-01-05T13:23:14Z",
  "published": "2023-03-10T21:30:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27899"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jenkinsci/jenkins/commit/f39c11fa27b14923260c4c9b896f0f373e2a0a17"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CVEProject/cvelist/blob/master/2023/27xxx/CVE-2023-27899.json"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2023-03-08/#SECURITY-2823"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incorrect Authorization in Jenkins Core"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.