swagger-api / swagger-api/swagger-codegen

CVE-2017-18640 (High) detected in multiple libraries

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security vulnerability
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Description

CVE-2017-18640 - High Severity Vulnerability

Vulnerable Libraries - snakeyaml-1.12.jar, snakeyaml-1.16.jar, snakeyaml-1.15.jar

snakeyaml-1.12.jar

YAML 1.1 parser and emitter for Java

Library home page: http://www.snakeyaml.org

Path to dependency file: /samples/client/petstore-security-test/scala/build.gradle

Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.12/ebe66a6b88caab31d7a19571ad23656377523545/snakeyaml-1.12.jar,/home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.12/ebe66a6b88caab31d7a19571ad23656377523545/snakeyaml-1.12.jar

Dependency Hierarchy:

  • swagger-core-1.5.8.jar (Root Library)
    • jackson-dataformat-yaml-2.4.5.jar
      • ❌ snakeyaml-1.12.jar (Vulnerable Library)
snakeyaml-1.16.jar

YAML 1.1 parser and emitter for Java

Library home page: http://www.snakeyaml.org

Path to dependency file: /samples/client/petstore/java/retrofit2-play25/build.gradle

Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.16/d64fb662c9e42789149f5078a62a22edda786c6a/snakeyaml-1.16.jar

Dependency Hierarchy:

  • play-java-ws_2.11-2.5.14.jar (Root Library)
    • play-java_2.11-2.5.14.jar
      • ❌ snakeyaml-1.16.jar (Vulnerable Library)
snakeyaml-1.15.jar

YAML 1.1 parser and emitter for Java

Library home page: http://www.snakeyaml.org

Path to dependency file: /samples/server/petstore/jaxrs-resteasy/joda/build.gradle

Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.15/3b132bea69e8ee099f416044970997bde80f4ea6/snakeyaml-1.15.jar,/home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.15/3b132bea69e8ee099f416044970997bde80f4ea6/snakeyaml-1.15.jar,/home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.15/3b132bea69e8ee099f416044970997bde80f4ea6/snakeyaml-1.15.jar,/home/wss-scanner/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/1.15/3b132bea69e8ee099f416044970997bde80f4ea6/snakeyaml-1.15.jar

Dependency Hierarchy:

  • play-java-ws_2.11-2.4.11.jar (Root Library)
    • play-java_2.11-2.4.11.jar
      • ❌ snakeyaml-1.15.jar (Vulnerable Library)

Found in HEAD commit: 4b7a8d7d7384aa6a27d6309c35ade0916edae7ed

Found in base branches: 3.0.0, master

Vulnerability Details

The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.

Publish Date: 2019-12-12

URL: CVE-2017-18640

CVSS 3 Score Details (7.5)

Base Score Metrics:

  • Exploitability Metrics:
    • Attack Vector: Network
    • Attack Complexity: Low
    • Privileges Required: None
    • User Interaction: None
    • Scope: Unchanged
  • Impact Metrics:
    • Confidentiality Impact: None
    • Integrity Impact: None
    • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18640

Release Date: 2019-12-12

Fix Resolution (org.yaml:snakeyaml): 1.26

Direct dependency fix Resolution (io.swagger:swagger-core): 1.5.19

  • Check this box to open an automated fix PR

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with samples/client/petstore-security-test/scala/build.gradle, samples/client/petstore/java/retrofit2-play25/build.gradle, and samples/server/petstore/jaxrs-resteasy/joda/build.gradle to trace the vulnerable SnakeYAML versions and their dependency paths. Upgrade the affected dependency or direct swagger-core dependency to the stated fixed version, then verify that these sample builds no longer resolve SnakeYAML 1.12, 1.15, or 1.16.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, scala
Domain
build-system, security
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
45/100

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