CVE-2024-27317 Apache Pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthorized File Modification

2024-03-1218:18:52

CWE-22

apache

www.cve.org

apache pulsar

unauthorized file modification

vulnerability

directory traversal

system behavior

patched versions

upgrade

CVSS3

8.4

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

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

AI Score

8.5

Confidence

High

EPSS

Percentile

15.5%

JSON

In Pulsar Functions Worker, authenticated users can upload functions in jar or nar files. These files, essentially zip files, are extracted by the Functions Worker. However, if a malicious file is uploaded, it could exploit a directory traversal vulnerability. This occurs when the filenames in the zip files, which aren’t properly validated, contain special elements like “…”, altering the directory path. This could allow an attacker to create or modify files outside of the designated extraction directory, potentially influencing system behavior. This vulnerability also applies to the Pulsar Broker when it is configured with “functionsWorkerEnabled=true”.

This issue affects Apache Pulsar versions from 2.4.0 to 2.10.5, from 2.11.0 to 2.11.3, from 3.0.0 to 3.0.2, from 3.1.0 to 3.1.2, and 3.2.0.

2.10 Pulsar Function Worker users should upgrade to at least 2.10.6.
2.11 Pulsar Function Worker users should upgrade to at least 2.11.4.
3.0 Pulsar Function Worker users should upgrade to at least 3.0.3.
3.1 Pulsar Function Worker users should upgrade to at least 3.1.3.
3.2 Pulsar Function Worker users should upgrade to at least 3.2.1.

Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Apache Pulsar",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.10.6",
        "status": "affected",
        "version": "2.4.0",
        "versionType": "semver"
      },
      {
        "lessThan": "2.11.4",
        "status": "affected",
        "version": "2.11.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.0.3",
        "status": "affected",
        "version": "3.0.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.1.3",
        "status": "affected",
        "version": "3.1.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.2.1",
        "status": "affected",
        "version": "3.2.0",
        "versionType": "semver"
      }
    ]
  }
]