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GHSA-7rmp-3g9f-cvq8
No affected components available
Summary
CWE-470 (Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') when having Javers selected as Entity Audit Framework
Details
In the following two occurences, user input directly leads to class loading without checking against e.g. a whitelist of allowed classes. This is also known as CWE-470 https://github.com/jhipster/generator-jhipster-entity-audit/blob/e21e83135d10c77d92203c89cb0b0063914e8fe0/generators/spring-boot-javers/templates/src/main/java/package/web/rest/JaversEntityAuditResource.java.ejs#L88 https://github.com/jhipster/generator-jhipster-entity-audit/blob/e21e83135d10c77d92203c89cb0b0063914e8fe0/generators/spring-boot-javers/templates/src/main/java/package/web/rest/JaversEntityAuditResource.java.ejs#L124
So, if an attacker manages to place some malicious classes into the classpath and also has access to these REST interface for calling the mentioned REST endpoints, using these lines of code can lead to unintended remote code execution.
PoC
- Place an arbitrary class with the right package name (starting with JHIpster applications path name) and make it available in class path
- Gain access to view entity's audit changelogs (Role: ADMIN)
- pass in the malicious class name part as
entityType(first mentioned part) //qualifiedName(second mentioned occurence) - class gets loaded and static code blocks in there get executed
--> Should be limited to the already existing whitelist of classes (see first method in that mentioned class)
Impact
Remote Code execution. You need to have some access to place malicious classes into the class path and you need to have a user with ADMIN role on the system.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs high-level or administrative privileges. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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