Deserialization of Untrusted Data The advisory has been revoked - it doesn't affect any version of package qlib Open this link in a new tab

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  • snyk-id


  • published

    15 Feb 2021

  • disclosed

    28 Dec 2020

  • credit

    Ajmal Aboobacker


This was deemed not a vulnerability.


qlib is an A Q Library for Data Scientist

Affected versions of this package are vulnerable to Deserialization of Untrusted Data. The workflow function in cli part of qlib was using an unsafe YAML load function.


Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.

Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.