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GHSA-7c5v-895v-w4q5

HighCVSS 8.8 / 10
Published Apr 1, 2025·Last modified Apr 1, 2025
Affected Components(0)

No affected components available

Description

Impact

Versions after 2.x and before 3.x of io.jooby:jooby-pac4j can cause deserialization of untrusted data

Patches

  • 2.17.0 (2.x)
  • 3.7.0 (3.x)

Workarounds

  • Not using io.jooby:jooby-pac4j until it gets patches.
  • Check what values you put/save on session

References

Version 2.x:

https://github.com/jooby-project/jooby/blob/v2.x/modules/jooby-pac4j/src/main/java/io/jooby/internal/pac4j/SessionStoreImpl.java#L39-L45

Version 3.x: https://github.com/jooby-project/jooby/blob/v3.6.1/modules/jooby-pac4j/src/main/java/io/jooby/internal/pac4j/SessionStoreImpl.java#L77-L84

Cause

In module pac4j io.jooby.internal.pac4j.SessionStoreImpl#get , it is used to handle sessions , and trying to get key value. In strToObject function ,it's trying to deserialize value when value starts with "b64~" , which might cause deserialization of untrusted data.

modules/jooby-pac4j/src/main/java/io/jooby/internal/pac4j/SessionStoreImpl.java

Here's a small demo using SessionStoreImpl#get to handle sessions ,and user can pass parameters.

屏幕截图 2025-03-25 051325

And following below is exploiting successfully(execute calculator)

屏幕截图 2025-03-24 015128（1）

Risk Scores
Base Score
8.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. 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.

Threat Intelligence
8.1

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.61%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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