CVE-2024-10907: Fschat Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-qg86-f892-m4hj
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CVSS 7.5
CWE-400 CWE-835
Published
Advisory Summary

CVE-2024-10907 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Fschat libraries in the PyPI ecosystem. The issue involves fastchat uncontrolled resource consumption vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2024-10907 at a Glance

CVE Identifier CVE-2024-10907
GHSA Identifier GHSA-qg86-f892-m4hj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Fschat
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2024-10907

To remediate this vulnerability, upgrade all affected Fschat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

fschat fixed: Latest secure release 
pip install fschat>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show fschat

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2024-10907, inspect your installed packages using pip:

pip show fschat

Analyze the terminal output to locate any version of Fschat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show fschat command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Fschat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinite loop, leading to excessive resource consumption and a complete denial of service (DoS) for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue.

CVE-2024-10907 Affected Fschat Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
fschat
pypi/fschat
PyPI
≤ 0.2.36

References

NVD — CVE-2024-10907 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-10907
Fschat Source Repository REPOSITORY
https://github.com/lm-sys/FastChat
huntr.com/bounties/bf3ca81d-3... WEB
https://huntr.com/bounties/bf3ca81d-3508-4455-95d9-0b653e46d6e4

Frequently Asked Questions

What is CVE-2024-10907?
CVE-2024-10907 is a security vulnerability in Fschat involving FastChat Uncontrolled Resource Consumption vulnerability under CWE-400: Uncontrolled Resource Consumption.
Which Fschat versions are affected?
Affected versions include releases prior to current release patches across affected packages: fschat.
What version fixes CVE-2024-10907?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is fschat affected?
Yes, fschat is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-10907?
CVE-2024-10907 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2024-10907?
CVE-2024-10907 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2024-10907?
Run the dependency tree command: 'pip show fschat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qg86-f892-m4hj",
  "modified" : "2025-03-21T16:37:30Z",
  "published" : "2025-03-20T12:32:41Z",
  "aliases" : [ "CVE-2024-10907" ],
  "summary" : "FastChat Uncontrolled Resource Consumption vulnerability",
  "details" : "In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinite loop, leading to excessive resource consumption and a complete denial of service (DoS) for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "fschat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.2.36"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-10907"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/lm-sys/FastChat"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/bf3ca81d-3508-4455-95d9-0b653e46d6e4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-21T16:37:30Z",
    "nvd_published_at" : "2025-03-20T10:15:21Z"
  }
}