CVE-2017-1000207: Swagger parser Deserialization Of Untrusted Data Vulnerability

HIGH
Advisory Identifier: GHSA-vgvf-9jh3-fg75
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CVSS 8.8
CWE-502
Published
Advisory Summary

CVE-2017-1000207 is a HIGH (CVSS 8.8) deserialization of untrusted data vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Swagger parser libraries in the Maven ecosystem. The issue involves deserialization of untrusted data in swagger-codegen. Remediation is available by upgrading affected packages to version 1.0.31, 2.2.2.

CVE-2017-1000207 at a Glance

CVE Identifier CVE-2017-1000207
GHSA Identifier GHSA-vgvf-9jh3-fg75
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Swagger parser
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

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:R/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 Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2017-1000207

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

io.swagger:swagger-parser fixed: 1.0.31 
<dependency>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-parser</artifactId>
    <version>1.0.31</version>
</dependency>
io.swagger:swagger-codegen fixed: 2.2.2 
<dependency>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-codegen</artifactId>
    <version>2.2.2</version>
</dependency>
Verify Direct and Transitive Dependencies

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

mvn dependency:tree -Dincludes=io.swagger

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2017-1000207, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.swagger

Analyze the terminal output to locate any version of Swagger parser in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.31), your application is affected.

Note: The mvn dependency:tree -Dincludes=io.swagger command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Swagger parser, 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

A vulnerability in Swagger-Parser's version <= 1.0.30 and Swagger codegen version <= 2.2.2 yaml parsing functionality results in arbitrary code being executed when a maliciously crafted yaml Open-API specification is parsed. This in particular, affects the 'generate' and 'validate' command in swagger-codegen (<= 2.2.2) and can lead to arbitrary code being executed when these commands are used on a well-crafted yaml specification.

CVE-2017-1000207 Affected Swagger parser Versions

2 component(s)
Fixed Versions:
1.0.312.2.2
Product / Package Ecosystem Affected Versions Fixed Version
io.swagger:swagger-parser
maven/io.swagger/swagger-parser
Maven
< 1.0.31
1.0.31
io.swagger:swagger-codegen
maven/io.swagger/swagger-codegen
Maven
< 2.2.2
2.2.2

References

NVD — CVE-2017-1000207 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-1000207
Swagger parser Source Repository REPOSITORY
https://github.com/swagger-api/swagger-parser/pull/481
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-vgvf-9jh3-fg75
Swagger parser Source Repository REPOSITORY
https://github.com/swagger-api/swagger-parser
lgtm.com/blog/swagger_snakey... WEB
https://lgtm.com/blog/swagger_snakeyaml_CVE-2017-1000207_CVE-2017-1000208

Frequently Asked Questions

What is CVE-2017-1000207?
CVE-2017-1000207 is a security vulnerability in Swagger parser involving Deserialization of Untrusted Data in swagger-codegen under CWE-502: Deserialization of Untrusted Data.
Which Swagger parser versions are affected?
Affected versions include releases prior to 1.0.31, 2.2.2 across affected packages: io.swagger:swagger-parser, io.swagger:swagger-codegen.
What version fixes CVE-2017-1000207?
Upgrading to 1.0.31, 2.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is swagger-parser affected?
Yes, io.swagger:swagger-parser is affected in releases prior to 1.0.31. Upgrade your dependency to 1.0.31 or later.
Is swagger-codegen affected?
Yes, io.swagger:swagger-codegen is affected in releases prior to 2.2.2. Upgrade your dependency to 2.2.2 or later.
What is the CVSS score of CVE-2017-1000207?
CVE-2017-1000207 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2017-1000207?
CVE-2017-1000207 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2017-1000207?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.swagger'. 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-vgvf-9jh3-fg75",
  "modified" : "2022-09-14T19:14:19Z",
  "published" : "2018-10-19T16:46:30Z",
  "aliases" : [ "CVE-2017-1000207" ],
  "summary" : "Deserialization of Untrusted Data in swagger-codegen",
  "details" : "A vulnerability in Swagger-Parser's version <= 1.0.30 and Swagger codegen version <= 2.2.2 yaml parsing functionality results in arbitrary code being executed when a maliciously crafted yaml Open-API specification is parsed. This in particular, affects the 'generate' and 'validate' command in swagger-codegen (<= 2.2.2) and can lead to arbitrary code being executed when these commands are used on a well-crafted yaml specification.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.swagger:swagger-parser"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.31"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.swagger:swagger-codegen"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-1000207"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/swagger-api/swagger-parser/pull/481"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-vgvf-9jh3-fg75"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/swagger-api/swagger-parser"
  }, {
    "type" : "WEB",
    "url" : "https://lgtm.com/blog/swagger_snakeyaml_CVE-2017-1000207_CVE-2017-1000208"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:57:48Z",
    "nvd_published_at" : null
  }
}