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OpenAdvisories
Medium · 4.4 CVE-2020-15250 EUVD-2020-1400GHSA-269g-pwp5-87pp

Information disclosure in JUnit4

Published Oct 12, 2020 · Updated Oct 7, 2026 · Assigned by GitHub_M

Vendor: junit-team Product: junit4 Package: junit Package: junit Package: junit:junit Package: junit4 Package: junit4 Ecosystem: Alpine Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Maven Ecosystem: Ubuntu

Description

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.

Affected products

VendorProductAffectedFixed
junit-team junit4 < 4.13.1 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 junit4 4.13.1-1 —
Debian 13 junit4 4.13.1-1 —
Debian 12 junit4 4.13.1-1 —
Debian 9 junit4 4.12-4+deb9u1 DLA-2426-1

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS junit4 4.12-8ubuntu0.20.04.1 USN-4731-1
Ubuntu 18.04 LTS junit4 4.12-8~18.04.1 USN-4731-1
Ubuntu 16.04 LTS junit4 4.12-4ubuntu1.1 USN-4731-1
Ubuntu 14.04 LTS junit4 No fix yet —

Alpine

Security tracker ↗
ReleasePackageFixed inAdvisory
Alpine v3.24 junit 4.13.1-r0 —
Alpine v3.23 junit 4.13.1-r0 —
Alpine v3.22 junit 4.13.1-r0 —
Alpine v3.21 junit 4.13.1-r0 —
Alpine v3.20 junit 4.13.1-r0 —
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Alpine v3.19 junit 4.13.1-r0 —
Alpine v3.18 junit 4.13.1-r0 —
Alpine v3.17 junit 4.13.1-r0 —
Alpine v3.16 junit 4.13.1-r0 —
Alpine v3.15 junit 4.13.1-r0 —
Alpine v3.14 junit 4.13.1-r0 —
Alpine v3.13 junit 4.13.1-r0 —

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 junit 4.13-7 —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven junit:junit >= 4.7, < 4.13.1 4.13.1 GHSA-269g-pwp5-87pp

Advisories 13

References