CVE-2019-1010142: Scapy Infinite Loop Vulnerability

HIGH
Advisory Identifier: GHSA-mpf2-q34c-fc6j
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CVSS 7.5
CWE-835
Published
Advisory Summary

CVE-2019-1010142 is a HIGH (CVSS 7.5) infinite loop vulnerability (CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')) affecting Scapy libraries in the PyPI ecosystem. The issue involves infinite loop in scapy. Remediation is available by upgrading affected packages to version 2.4.1.

CVE-2019-1010142 at a Glance

CVE Identifier CVE-2019-1010142
GHSA Identifier GHSA-mpf2-q34c-fc6j
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Product Scapy
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:3.1/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-2019-1010142

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

scapy fixed: 2.4.1 
pip install scapy>=2.4.1
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 scapy

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2019-1010142, inspect your installed packages using pip:

pip show scapy

Analyze the terminal output to locate any version of Scapy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.4.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'), where the product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. In Scapy, 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

scapy is affected by a Denial of Service vulnerability resulting in an infinite loop and resource consumption rendering the program unresponsive. The component is: `_RADIUSAttrPacketListField.getfield(self..)`. The attack vector is over the network or in a pcap. both work.

CVE-2019-1010142 Affected Scapy Versions

1 component(s)
Fixed Versions:
2.4.1
Product / Package Ecosystem Affected Versions Fixed Version
scapy
pypi/scapy
PyPI
≥ 2.4-rc1
< 2.4.1
2.4.1

References

NVD — CVE-2019-1010142 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-1010142
Scapy Source Repository REPOSITORY
https://github.com/secdev/scapy/pull/1409
Scapy Source Repository REPOSITORY
https://github.com/secdev/scapy/pull/1409/files#diff-441eff981e466959968111fc6314fe93L1058
Scapy Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/scapy/PYSEC-2019-120.yaml
Scapy Source Repository REPOSITORY
https://github.com/secdev/scapy
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/42NRPMC3NS2QVFNIXYP6WV2T3LMLLY7E
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T46XW4S5BCA3VV3JT3C5Q6LBEXSIACLN
www.imperva.com/blog/scapy-sploit-p... WEB
https://www.imperva.com/blog/scapy-sploit-python-network-tool-is-vulnerable-to-denial-of-service-dos-attack-cve-pending

Frequently Asked Questions

What is CVE-2019-1010142?
CVE-2019-1010142 is a security vulnerability in Scapy involving Infinite Loop in scapy under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop').
Which Scapy versions are affected?
Affected versions include releases prior to 2.4.1 across affected packages: scapy.
What version fixes CVE-2019-1010142?
Upgrading to 2.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is scapy affected?
Yes, scapy is affected in releases prior to 2.4.1. Upgrade your dependency to 2.4.1 or later.
What is the CVSS score of CVE-2019-1010142?
CVE-2019-1010142 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2019-1010142?
CVE-2019-1010142 is classified under CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') (The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.).
How can I check PyPI dependencies for CVE-2019-1010142?
Run the dependency tree command: 'pip show scapy'. 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-mpf2-q34c-fc6j",
  "modified" : "2024-10-22T16:40:01Z",
  "published" : "2019-07-22T14:53:58Z",
  "aliases" : [ "CVE-2019-1010142" ],
  "summary" : "Infinite Loop in scapy",
  "details" : "scapy is affected by a Denial of Service vulnerability resulting in an infinite loop and resource consumption rendering the program unresponsive. The component is: `_RADIUSAttrPacketListField.getfield(self..)`. The attack vector is over the network or in a pcap. both work.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "scapy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.4-rc1"
      }, {
        "fixed" : "2.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-1010142"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/secdev/scapy/pull/1409"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/secdev/scapy/pull/1409/files#diff-441eff981e466959968111fc6314fe93L1058"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/scapy/PYSEC-2019-120.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/secdev/scapy"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/42NRPMC3NS2QVFNIXYP6WV2T3LMLLY7E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T46XW4S5BCA3VV3JT3C5Q6LBEXSIACLN"
  }, {
    "type" : "WEB",
    "url" : "https://www.imperva.com/blog/scapy-sploit-python-network-tool-is-vulnerable-to-denial-of-service-dos-attack-cve-pending"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-07-22T14:21:26Z",
    "nvd_published_at" : "2019-07-19T16:15:00Z"
  }
}