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Class Loading Vulnerability

High
MaisiKoleni published GHSA-227w-wv4j-67h4 Feb 9, 2022

Package

maven de.tum.in.ase.artemis-java-test-sandbox (Maven)

Affected versions

< 1.8.0

Patched versions

1.8.0

Description

Impact

This affects all Artemis users who test Java assignments. Ares is not required.
Students code that gets automatically tested can run arbitrary code in the container,
or arbitrary code on the machine of an assessor in case of manual correction.

Patches

The problem cannot be resolved easily in Ares itself. Use the Maven Enforcer Plugin as follows:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-enforcer-plugin</artifactId>
    <version>3.0.0</version>
    <executions>
        <execution>
            <id>enforce-no-student-code-in-trusted-packages</id>
            <phase>process-classes</phase>
            <goals>
                <goal>enforce</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <rules>
            <requireFilesDontExist>
                <files>
                    <!-- ADD HERE THE RULES ARES TELLS YOU ARE MISSING -->
                </files>
            </requireFilesDontExist>
        </rules>
    </configuration>
</plugin>

This fails the build if student classes reside in such packages that Ares trusts. Trusted packages added in Ares using @AddTrustedPackage should be added as well.

For more information

If you have any questions or comments about this advisory:

References

See the assignment of Julius that passes the tests in TUM Artemis course: "Test - Praktikum: Grundlagen der Programmierung (Testkurs für Tutoren) - Security Tests" (if that still exists in 2022).

Also see #15 for almost the same problem.

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
Low
Privileges required
Low
User interaction
Required
Scope
Changed
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:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVE ID

No known CVE

Credits