junit junit4 CVE-2020-15250 vulnerability in Junit and Other Products
Published on October 12, 2020

Information disclosure in JUnit4

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In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.

Github Repository NVD

Vulnerability Analysis

CVE-2020-15250 is exploitable with local system access, requires user interaction and a small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
LOCAL
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

What is an Information Disclosure Vulnerability?

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

CVE-2020-15250 has been classified to as an Information Disclosure vulnerability or weakness.


Products Associated with CVE-2020-15250

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-15250 are published in these products:

Junit4
 
Debian Linux
 
Apache Pluto
 
Oracle Communications Cloud Native Core Policy
 
Oracle
 

Affected Versions

junit-team junit4 Version < 4.13.1 is affected by CVE-2020-15250

Vulnerable Packages

The following package name and versions may be associated with CVE-2020-15250

Package Manager Vulnerable Package Versions Fixed In
maven junit:junit >= 4.7, < 4.13.1 4.13.1

Exploit Probability

EPSS
0.02%
Percentile
6.01%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.