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Deserialization of Untrusted Data Affecting com.alibaba:fastjson package, versions [,1.2.83)

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 2.2% (90th percentile)
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NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-COMALIBABA-2859222
  • published 7 Jun 2022
  • disclosed 6 Jun 2022
  • credit Unknown
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Introduced: 6 Jun 2022

CVE-2022-25845 Open this link in a new tab
CWE-502 Open this link in a new tab
First added by Snyk

How to fix?

Upgrade com.alibaba:fastjson to version 1.2.83 or higher.

Overview

com.alibaba:fastjson is a fast JSON parser/generator for Java.

Affected versions of this package are vulnerable to Deserialization of Untrusted Data by bypassing the default autoType shutdown restrictions, which is possible under certain conditions. Exploiting this vulnerability allows attacking remote servers.

Workaround:

If upgrading is not possible, you can enable safeMode.

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.