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Deserialization of Untrusted Data Affecting rubygems-update package, versions >=2.0.0, <2.6.14

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 13.51% (96th percentile)
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NVD
9.8 critical
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Red Hat
5.6 medium

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  • Snyk ID SNYK-RUBY-RUBYGEMSUPDATE-3357932
  • published 9 Mar 2023
  • disclosed 13 May 2022
  • credit max
Report a new vulnerability Found a mistake?

Introduced: 13 May 2022

CVE-2017-0903 Open this link in a new tab
CWE-502 Open this link in a new tab

How to fix?

Upgrade rubygems-update to version 2.6.14 or higher.

Overview

rubygems-update is an inbuilt rubygem for updating rubygems.

Affected versions of this package are vulnerable to Deserialization of Untrusted Data when YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.

Details

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.