github - ghsa-rvp4-r3g6-8hxq

GHSA-RVP4-R3G6-8HXQ

Vulnerability from github – Published: 2022-06-20 22:33 – Updated: 2023-08-08 20:30

Summary

Insufficiently Protected Credentials via Insecure Temporary File in org.apache.nifi:nifi-single-user-utils

Details

Impact

org.apache.nifi.authentication.single.user.writer.StandardLoginCredentialsWriter contains a local information disclosure vulnerability due to writing credentials (username and password) to a file that is readable by all other users on unix-like systems. On unix-like systems, the system's temporary directory is shared between all users on that system. As such, files written to that directory without setting the correct file permissions can allow other users on that system to view the contents of the files written to those temporary files.

Source

An insecure temporary file is created here: - https://github.com/apache/nifi/blob/6a1c7c72d5b91b9ce5d5cb5b86e3155d21e2c19b/nifi-commons/nifi-single-user-utils/src/main/java/org/apache/nifi/authentication/single/user/writer/StandardLoginCredentialsWriter.java#L75

The username and password credentials are written to this file here: - https://github.com/apache/nifi/blob/6a1c7c72d5b91b9ce5d5cb5b86e3155d21e2c19b/nifi-commons/nifi-single-user-utils/src/main/java/org/apache/nifi/authentication/single/user/writer/StandardLoginCredentialsWriter.java#L85-L95

Patches

The vulnerability has been patched in version 1.16.

Prerequisites

This vulnerability impacts Unix-like systems, and very old versions of Mac OSX and Windows as they all share the system temporary directory between all users.

Workarounds

Setting the java.io.tmpdir system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability for all operating systems.

References

https://issues.apache.org/jira/browse/NIFI-9785
https://github.com/apache/nifi/commit/859d5fe
https://github.com/apache/nifi/pull/5856
https://nifi.apache.org/security.html#CVE-2022-26850
https://twitter.com/JLLeitschuh/status/1511736635645435904?s=20&t=I3w3zF6Y2DUvWYsEFqERjg

Severity ?

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.15.3"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.nifi:nifi-single-user-utils"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-26850"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-06-20T22:33:41Z",
    "nvd_published_at": "2022-04-06T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n`org.apache.nifi.authentication.single.user.writer.StandardLoginCredentialsWriter` contains a local information disclosure vulnerability due to writing credentials (username and password) to a file that is readable by all other users on unix-like systems. On unix-like systems, the system\u0027s temporary directory is shared between all users on that system. As such, files written to that directory without setting the correct file permissions can allow other users on that system to view the contents of the files written to those temporary files.\n\n### Source\n\nAn insecure temporary file is created here:\n - https://github.com/apache/nifi/blob/6a1c7c72d5b91b9ce5d5cb5b86e3155d21e2c19b/nifi-commons/nifi-single-user-utils/src/main/java/org/apache/nifi/authentication/single/user/writer/StandardLoginCredentialsWriter.java#L75\n\nThe username and password credentials are written to this file here:\n - https://github.com/apache/nifi/blob/6a1c7c72d5b91b9ce5d5cb5b86e3155d21e2c19b/nifi-commons/nifi-single-user-utils/src/main/java/org/apache/nifi/authentication/single/user/writer/StandardLoginCredentialsWriter.java#L85-L95\n\n### Patches\n\nThe vulnerability has been patched in version `1.16`.\n\n### Prerequisites\n\nThis vulnerability impacts Unix-like systems, and very old versions of Mac OSX and Windows as they all share the system temporary directory between all users.\n\n### Workarounds\n\nSetting the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability for all operating systems.\n\n### References\n\n - https://issues.apache.org/jira/browse/NIFI-9785\n - https://github.com/apache/nifi/commit/859d5fe\n - https://github.com/apache/nifi/pull/5856\n - https://nifi.apache.org/security.html#CVE-2022-26850\n - https://twitter.com/JLLeitschuh/status/1511736635645435904?s=20\u0026t=I3w3zF6Y2DUvWYsEFqERjg",
  "id": "GHSA-rvp4-r3g6-8hxq",
  "modified": "2023-08-08T20:30:32Z",
  "published": "2022-06-20T22:33:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-rvp4-r3g6-8hxq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-26850"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/nifi/commit/859d5fe"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/nifi/commit/859d5fe8cfe05ad24600b021f0ebf15753a8105c"
    },
    {
      "type": "WEB",
      "url": "https://nifi.apache.org/security.html#CVE-2022-26850"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2022/04/06/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Insufficiently Protected Credentials via Insecure Temporary File in org.apache.nifi:nifi-single-user-utils"
}

CVE-2022-26850 (GCVE-0-2022-26850)

Vulnerability from cvelistv5 – Published: 2022-04-06 17:40 – Updated: 2024-08-03 05:11

Summary

When creating or updating credentials for single-user access, Apache NiFi wrote a copy of the Login Identity Providers configuration to the operating system temporary directory. On most platforms, the operating system temporary directory has global read permissions. NiFi immediately moved the temporary file to the final configuration directory, which significantly limited the window of opportunity for access. NiFi 1.16.0 includes updates to replace the Login Identity Providers configuration without writing a file to the operating system temporary directory.

Severity ?

No CVSS data available.

CWE

Insufficiently protected credentials

Assigner

apache

References

URL

Tags

	https://nifi.apache.org/security.html#CVE-2022-26850	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2022/04/06/2	mailing-listx_refsource_MLIST

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache NiFi	Affected: NiFi 1.14.0 to 1.15.3

Credits

This issue was discovered by Jonathan Leitschuh (https://twitter.com/jlleitschuh)

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 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

GHSA-RVP4-R3G6-8HXQ

Impact

Source

Patches

Prerequisites

Workarounds

References

CVE-2022-26850 (GCVE-0-2022-26850)

Tags

Sightings

Nomenclature