// For flags

CVE-2023-34040

Java Deserialization vulnerability in Spring-Kafka When Improperly Configured

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In Spring for Apache Kafka 3.0.9 and earlier and versions 2.9.10 and earlier, a possible deserialization attack vector existed, but only if unusual configuration was applied. An attacker would have to construct a malicious serialized object in one of the deserialization exception record headers.

Specifically, an application is vulnerable when all of the following are true:

* The user does notĀ configure an ErrorHandlingDeserializer for the key and/or value of the record
* The user explicitly sets container properties checkDeserExWhenKeyNull and/or checkDeserExWhenValueNull container properties to true.
* The user allows untrusted sources to publish to a Kafka topic


By default, these properties are false, and the container only attempts to deserialize the headers if an ErrorHandlingDeserializer is configured. The ErrorHandlingDeserializer prevents the vulnerability by removing any such malicious headers before processing the record.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-05-25 CVE Reserved
  • 2023-08-24 CVE Published
  • 2023-08-30 EPSS Updated
  • 2023-08-30 First Exploit
  • 2024-10-01 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-502: Deserialization of Untrusted Data
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Vmware
Search vendor "Vmware"
Spring For Apache Kafka
Search vendor "Vmware" for product "Spring For Apache Kafka"
>= 2.8.1 <= 2.9.10
Search vendor "Vmware" for product "Spring For Apache Kafka" and version " >= 2.8.1 <= 2.9.10"
-
Affected
Vmware
Search vendor "Vmware"
Spring For Apache Kafka
Search vendor "Vmware" for product "Spring For Apache Kafka"
>= 3.0.0 <= 3.0.9
Search vendor "Vmware" for product "Spring For Apache Kafka" and version " >= 3.0.0 <= 3.0.9"
-
Affected