cvelistv5 - cve-2025-62515

CVE-2025-62515 (GCVE-0-2025-62515)

Vulnerability from cvelistv5 – Published: 2025-10-17 20:38 – Updated: 2025-10-17 20:56

Title

Remote Code Execution by Pickle Deserialization via FlightServer in pyquokka

Summary

pyquokka is a framework for making data lakes work for time series. In versions 0.3.1 and prior, the FlightServer class directly uses pickle.loads() to deserialize action bodies received from Flight clients without any sanitization or validation in the do_action() method. The vulnerable code is located in pyquokka/flight.py at line 283 where arbitrary data from Flight clients is directly passed to pickle.loads(). When FlightServer is configured to listen on 0.0.0.0, this allows attackers across the entire network to perform arbitrary remote code execution by sending malicious pickled payloads through the set_configs action. Additional vulnerability points exist in the cache_garbage_collect, do_put, and do_get functions where pickle.loads is used to deserialize untrusted remote data.

Severity ?

9.8 (Critical)


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

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

GitHub_M

References

URL

Tags

https://github.com/marsupialtail/quokka/security/…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	marsupialtail	quokka	Affected: <= 3.0.1

Show details on NVD website

JSON

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GHSA-F74J-GFFQ-VM9P

Vulnerability from github – Published: 2025-10-17 18:08 – Updated: 2025-10-17 21:32

Summary

pyquokka is Vulnerable to Remote Code Execution by Pickle Deserialization via FlightServer

Details

Description

In the FlightServer class of the pyquokka framework, the do_action() method directly uses pickle.loads() to deserialize action bodies received from Flight clients without any sanitization or validation, which results in a remote code execution vulnerability. The vulnerable code is located in pyquokka/flight.py at line 283, where arbitrary data from Flight clients is directly passed to pickle.loads().

Even more concerning, when FlightServer is configured to listen on 0.0.0.0 (as shown in the provided server example at line 339), this allows attackers across the entire network to perform arbitrary remote code execution by sending malicious pickled payloads through the set_configs action.

In addition, the functions cache_garbage_collect, do_put, and do_get also contain vulnerability points where pickle.loads is used to deserialize untrusted remote data. Please review and fix these issues accordingly. This report uses the set_configs action as an example.

Proof of Concept

Step 1: The victim user starts a FlightServer that binds to the network interface, e.g.:

server = FlightServer("0.0.0.0", location = "grpc+tcp://0.0.0.0:5005")
server.serve()
````
* Step 2:
The attacker can then send malicious pickle dump data through the Flight client connection. The provided PoC demonstrates how an attacker can execute "ls -l" command:

```python
class RCE:
def __reduce__(self):
import os
return (os.system, ('ls -l',))

import pickle
action_body = pickle.dumps(RCE())
action = pyarrow.flight.Action("set_configs", action_body)

When the server receives this payload, the FlightServer.do_action() method calls pickle.loads(action.body.to_pybytes()) on line 283, which triggers the execution of the malicious code through Python's pickle deserialization mechanism. The provided flight_client.py demonstrates a complete PoC that connects to the vulnerable server and executes arbitrary commands through the pickle deserialization vulnerability.

When the vulnerability is reproduced, python flight.py can be run to init the server and then run flight_client.py. There is an attack demo in the attachment.

Impact

Remote code execution on the victim's machine over the network. Once the victim starts the FlightServer with network binding (especially 0.0.0.0), an attacker on the network can gain arbitrary code execution by connecting to the Flight endpoint and sending crafted pickle payloads through the set_configs action. This vulnerability allows for:

Complete system compromise
Data exfiltration
Lateral movement within the network
Denial of service attacks
Installation of persistent backdoors

Mitigation

Replace unsafe deserialization: Replace pickle.loads() with safer alternatives such as:
JSON serialization for simple data structures
Protocol Buffers or MessagePack for complex data
If pickle must be used, implement a custom Unpickler with a restricted find_class() method that only allows whitelisted classes
Network security:
If the service is intended for internal use only, bind to localhost (127.0.0.1) instead of 0.0.0.0
Implement authentication and authorization mechanisms
Security warnings: When starting the service on public interfaces, display clear security warnings to inform users about the risks.

Severity ?

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pyquokka"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-62515"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-17T18:08:09Z",
    "nvd_published_at": "2025-10-17T21:15:36Z",
    "severity": "CRITICAL"
  },
  "details": "### Description\n\nIn the FlightServer class\u00a0of the pyquokka framework, the\u00a0do_action()\u00a0method\u00a0directly uses\u00a0pickle.loads()\u00a0to deserialize action\u00a0bodies received\u00a0from Flight clients without any sanitization or validation, which results in a remote code execution vulnerability. The vulnerable code is located in\u00a0pyquokka/flight.py\u00a0at\u00a0line 283, where arbitrary data from Flight clients\u00a0is directly passed\u00a0to\u00a0pickle.loads().\n\nEven\u00a0more concerning, when FlightServer is configured to listen on\u00a00.0.0.0\u00a0(as shown\u00a0in the provided server example at line\u00a0339), this allows attackers across the entire network to perform arbitrary remote code execution\u00a0by sending malicious pickled payloads through the\u00a0set_configs\u00a0action.\n\nIn addition, the functions cache_garbage_collect, do_put, and do_get also contain vulnerability points where pickle.loads is used to deserialize untrusted remote data. Please review and fix these issues accordingly. This report uses the set_configs action as an example.\n\n\n### Proof of Concept\n\n* Step 1:\nThe victim user\u00a0starts a FlightServer that binds to the network interface, e.g.:\n```\nserver\u00a0=\u00a0FlightServer(\"0.0.0.0\",\u00a0location\u00a0=\u00a0\"grpc+tcp://0.0.0.0:5005\")\nserver.serve()\n````\n* Step 2:\nThe attacker can then send malicious pickle dump data through\u00a0the Flight client connection. The provided PoC demonstrates how an attacker can execute \"ls -l\" command:\n\n```python\nclass RCE:\ndef __reduce__(self):\nimport os\nreturn (os.system, (\u0027ls -l\u0027,))\n\nimport pickle\naction_body = pickle.dumps(RCE())\naction = pyarrow.flight.Action(\"set_configs\", action_body)\n```\n\nWhen the\u00a0server receives this payload, the\u00a0FlightServer.do_action()\u00a0method calls\u00a0pickle.loads(action.body.to_pybytes())\u00a0on line 283,\u00a0which triggers the execution\u00a0of the malicious code through Python\u0027s pickle deserialization mechanism. The provided\u00a0flight_client.py\u00a0demonstrates a complete\u00a0PoC that connects to the vulnerable server and executes arbitrary commands through\u00a0the pickle deserialization vulnerability.\n\nWhen the vulnerability is reproduced, python flight.py can be run to init the server and then run flight_client.py. There is an attack demo in the attachment.\n\n### Impact\n\nRemote code execution on the\u00a0victim\u0027s machine over the network. Once the victim starts\u00a0the FlightServer with network binding (especially\u00a00.0.0.0), an attacker on\u00a0the network\u00a0can gain arbitrary code execution by connecting to the Flight endpoint\u00a0and sending crafted pickle payloads through the\u00a0set_configs\u00a0action. This vulnerability allows\u00a0for:\n\n- Complete system compromise\n- Data exfiltration\n- Lateral movement within the network\n- Denial of service attacks\n- Installation of persistent backdoors\n\n### Mitigation\n\n1. **Replace unsafe deserialization**: Replace `pickle.loads()` with safer alternatives such as:\n   - JSON serialization for simple data structures\n   - Protocol Buffers or MessagePack for complex data\n   - If pickle must be used, implement a custom `Unpickler` with a restricted `find_class()` method that only allows whitelisted classes\n\n2. **Network security**: \n   - If the service is intended for internal use only, bind to localhost (`127.0.0.1`) instead of `0.0.0.0`\n   - Implement authentication and authorization mechanisms\n\n3. **Security warnings**: When starting the service on public interfaces, display clear security warnings to inform users about the risks.",
  "id": "GHSA-f74j-gffq-vm9p",
  "modified": "2025-10-17T21:32:52Z",
  "published": "2025-10-17T18:08:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/marsupialtail/quokka/security/advisories/GHSA-f74j-gffq-vm9p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62515"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/marsupialtail/quokka"
    },
    {
      "type": "WEB",
      "url": "https://github.com/marsupialtail/quokka/blob/master/pyquokka/flight.py#L283"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pyquokka is Vulnerable to Remote Code Execution by Pickle Deserialization via FlightServer "
}

FKIE_CVE-2025-62515

Vulnerability from fkie_nvd - Published: 2025-10-17 21:15 - Updated: 2025-10-21 19:31

Severity ?

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/marsupialtail/quokka/security/advisories/GHSA-f74j-gffq-vm9p

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pyquokka is a framework for making data lakes work for time series. In versions 0.3.1 and prior, the FlightServer class directly uses pickle.loads() to deserialize action bodies received from Flight clients without any sanitization or validation in the do_action() method. The vulnerable code is located in pyquokka/flight.py at line 283 where arbitrary data from Flight clients is directly passed to pickle.loads(). When FlightServer is configured to listen on 0.0.0.0, this allows attackers across the entire network to perform arbitrary remote code execution by sending malicious pickled payloads through the set_configs action. Additional vulnerability points exist in the cache_garbage_collect, do_put, and do_get functions where pickle.loads is used to deserialize untrusted remote data."
    }
  ],
  "id": "CVE-2025-62515",
  "lastModified": "2025-10-21T19:31:50.020",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-17T21:15:36.783",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/marsupialtail/quokka/security/advisories/GHSA-f74j-gffq-vm9p"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

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

CVE-2025-62515 (GCVE-0-2025-62515)

GHSA-F74J-GFFQ-VM9P

Description

Proof of Concept

Impact

Mitigation

FKIE_CVE-2025-62515

Tags

Sightings

Nomenclature