Vulnerability	Vulnerable Version
M Deserialization of Untrusted Data ch.qos.logback:logback-classic is a reliable, generic, fast and flexible logging library for Java. Affected versions of this package are vulnerable to Deserialization of Untrusted Data in `HardenedObjectInputStream`, whose `resolveClass` allowlist admitted any class whose name starts with `java.lang` or `java.util` rather than matching specific authorized classes. An attacker can instantiate dangerous classes such as `java.lang.ProcessBuilder` during deserialization, reaching remote code execution through a gadget chain, by delivering a malicious serialized object to a logback component that deserializes it, such as its socket receiver for serialized logging events (`SocketNode`). Exploitation requires the application to deserialize attacker-controlled serialized data through logback, in practice via its socket-based receiver, together with a usable gadget class on the classpath. How to fix Deserialization of Untrusted Data? Upgrade `ch.qos.logback:logback-classic` to version 1.5.33 or higher.	[,1.5.33)

Deserialization of Untrusted Data

ch.qos.logback:logback-classic is a reliable, generic, fast and flexible logging library for Java.

Affected versions of this package are vulnerable to Deserialization of Untrusted Data in HardenedObjectInputStream, whose resolveClass allowlist admitted any class whose name starts with java.lang or java.util rather than matching specific authorized classes. An attacker can instantiate dangerous classes such as java.lang.ProcessBuilder during deserialization, reaching remote code execution through a gadget chain, by delivering a malicious serialized object to a logback component that deserializes it, such as its socket receiver for serialized logging events (SocketNode). Exploitation requires the application to deserialize attacker-controlled serialized data through logback, in practice via its socket-based receiver, together with a usable gadget class on the classpath.

How to fix Deserialization of Untrusted Data?

Upgrade ch.qos.logback:logback-classic to version 1.5.33 or higher.

[,1.5.33)

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