What is CVE-2018-21234?

CVE-2018-21234 is a critical-severity software vulnerability (Insecure deserialization) with a CVSS score of 9.8. Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

Is CVE-2018-21234 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 8%.

What products does CVE-2018-21234 affect?

Tracked products affected include Apache Hive. Check the version you run to see whether it is affected.

How do I fix CVE-2018-21234?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2018-21234

CRITICAL severity · CVSS 9.8 · Insecure deserialization

9.8CVSS CRITICAL

Summary

Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)8%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Apache Hive

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/oblac/jodd/commit/9bffc3913aeb8472c11bb543243004b4b4376f16 ↗

Additional information

NVD record
https://github.com/oblac/jodd/commit/9bffc3913aeb8472c11bb543243004b4b4376f16Patch
https://github.com/oblac/jodd/compare/v5.0.3...v5.0.4Advisory
https://github.com/oblac/jodd/issues/628Advisory
https://lists.apache.org/thread.html/r0bacc701ab7105500a0ab2769270d18f332cb379e6a62ec7553f3327%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/r157d01c96a2c10e7ceb3e005f42c52cfe87b11dd018935e1c4277433%40%3Cgitbox.hive.apache.org%3E
https://lists.apache.org/thread.html/r317aec95c436848233047af7ecb3ce04ce446eb6031f981aef50df0d%40%3Cdev.drill.apache.org%3E
https://lists.apache.org/thread.html/r729bc1e0f367fe8a857ac8a14641dba284ac4cf5131edf483022cf59%40%3Cissues.hive.apache.org%3E
https://lists.apache.org/thread.html/r965503b27d67a2d934e34fc1d088c9547d51d927c43b8b9bd9b7e695%40%3Cissues.hive.apache.org%3E