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Improper Control of Generation of Code ('Code Injection') in js-yaml

Cxcc09496a-59c8

  • js-yaml
  • org.webjars:js-yaml
  • org.webjars.npm:js-yaml
High
8.1/10

Summary

The js-yaml package is vulnerable to Code Injection in versions prior to 3.13.1. The "load()" function may execute arbitrary code injected through a malicious YAML file. Objects that have "toString" as a key and JavaScript code as the value can be used as explicit mapping keys. This allows attackers to execute the supplied code through the "load()" function. The "safeLoad()" function is unaffected.

  • HIGH
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-94 - Code Injection

Code injection is a type of vulnerability that allows an attacker to execute arbitrary code. This vulnerability fully compromises the machine and can cause a wide variety of security issues, such as unauthorized access to sensitive information, manipulation of data, denial of service attacks etc. Code injection is different from command injection in the fact that it is limited by the functionality of the injected language (e.g. PHP), as opposed to command injection, which leverages existing code to execute commands, usually within the context of a shell.

References

Advisory Timeline

  • Published