CVE-2019-1010268: Ladon Improper Restriction Of XML External Vulnerability

CRITICAL
Advisory Identifier: GHSA-vg35-vc9f-q7x2
Share
CVSS 9.8
CWE-611
Published
Advisory Summary

CVE-2019-1010268 is a CRITICAL (CVSS 9.8) improper restriction of xml external vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Ladon libraries in the PyPI ecosystem. The issue involves improper restriction of xml external entity reference in ladon. Remediation is available in the latest vendor maintenance releases.

CVE-2019-1010268 at a Glance

CVE Identifier CVE-2019-1010268
GHSA Identifier GHSA-vg35-vc9f-q7x2
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product Ladon
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-1010268

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

ladon fixed: Latest secure release 
pip install ladon>=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 ladon

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2019-1010268, inspect your installed packages using pip:

pip show ladon

Analyze the terminal output to locate any version of Ladon 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 ladon command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. In Ladon, 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

Ladon since 0.6.1 (since ebef0aae48af78c159b6fce81bc6f5e7e0ddb059) is affected by: XML External Entity (XXE). The impact is: Information Disclosure, reading files and reaching internal network endpoints. The component is: SOAP request handlers. For instance: https://bitbucket.org/jakobsg/ladon/src/42944fc012a3a48214791c120ee5619434505067/src/ladon/interfaces/soap.py#lines-688. The attack vector is: Send a specially crafted SOAP call.

CVE-2019-1010268 Affected Ladon Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
ladon
pypi/ladon
PyPI
≥ 0.6.1
≤ 1.0.7

References

NVD — CVE-2019-1010268 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-1010268
bitbucket.org/jakobsg/ladon PACKAGE
https://bitbucket.org/jakobsg/ladon
bitbucket.org/jakobsg/ladon/pull-... WEB
https://bitbucket.org/jakobsg/ladon/pull-requests/9
bitbucket.org/jakobsg/ladon/src/4... WEB
https://bitbucket.org/jakobsg/ladon/src/42944fc012a3a48214791c120ee5619434505067/src/ladon/interfaces/soap.py#lines-688
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-vg35-vc9f-q7x2
Ladon Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/ladon/PYSEC-2019-184.yaml
www.exploit-db.com/exploits/43113 WEB
https://www.exploit-db.com/exploits/43113

Frequently Asked Questions

What is CVE-2019-1010268?
CVE-2019-1010268 is a security vulnerability in Ladon involving Improper Restriction of XML External Entity Reference in ladon under CWE-611: Improper Restriction of XML External Entity Reference.
Which Ladon versions are affected?
Affected versions include releases prior to current release patches across affected packages: ladon.
What version fixes CVE-2019-1010268?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is ladon affected?
Yes, ladon 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-2019-1010268?
CVE-2019-1010268 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-1010268?
CVE-2019-1010268 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).
How can I check PyPI dependencies for CVE-2019-1010268?
Run the dependency tree command: 'pip show ladon'. 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-vg35-vc9f-q7x2",
  "modified" : "2024-09-27T18:25:35Z",
  "published" : "2019-07-26T16:09:54Z",
  "aliases" : [ "CVE-2019-1010268" ],
  "summary" : "Improper Restriction of XML External Entity Reference in ladon",
  "details" : "Ladon since 0.6.1 (since ebef0aae48af78c159b6fce81bc6f5e7e0ddb059) is affected by: XML External Entity (XXE). The impact is: Information Disclosure, reading files and reaching internal network endpoints. The component is: SOAP request handlers. For instance: https://bitbucket.org/jakobsg/ladon/src/42944fc012a3a48214791c120ee5619434505067/src/ladon/interfaces/soap.py#lines-688. The attack vector is: Send a specially crafted SOAP call.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ladon"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.6.1"
      }, {
        "last_affected" : "1.0.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-1010268"
  }, {
    "type" : "PACKAGE",
    "url" : "https://bitbucket.org/jakobsg/ladon"
  }, {
    "type" : "WEB",
    "url" : "https://bitbucket.org/jakobsg/ladon/pull-requests/9"
  }, {
    "type" : "WEB",
    "url" : "https://bitbucket.org/jakobsg/ladon/src/42944fc012a3a48214791c120ee5619434505067/src/ladon/interfaces/soap.py#lines-688"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-vg35-vc9f-q7x2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/ladon/PYSEC-2019-184.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/43113"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-07-25T15:54:06Z",
    "nvd_published_at" : "2019-07-18T17:15:00Z"
  }
}