Deserialization of Untrusted Data Affecting org.pac4j:pac4j-core package, versions [,4.0.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JAVA-ORGPAC4J-8181528
- published11 Oct 2024
- disclosed10 Oct 2024
- creditMichael Stepankin
Introduced: 10 Oct 2024
CVE-2023-25581 (opens in a new tab)How to fix?
Upgrade org.pac4j:pac4j-core to version 4.0.0 or higher.
Overview
org.pac4j:pac4j-core is a pac4j is an easy and powerful security engine for Java to authenticate users, get their profiles and manage authorizations in order to secure web applications and web services.
Affected versions of this package are vulnerable to Deserialization of Untrusted Data due to the handling of serialized Java objects inside the InternalAttributeHandler#prepare method. An attacker can execute arbitrary code by providing a specially crafted attribute that contains a serialized object with a specific prefix and Base64 encoding.
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.