CVE-2021-29429
MediumCVSS 4.0Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
In Gradle before version 7.0, files created with open permissions in the system temporary directory can allow an attacker to access information downloaded by Gradle. Some builds could be vulnerable to a local information disclosure, as remote files accessed through TextResourceFactory are downloaded into the system temporary directory first. If you do not use the TextResourceFactory API, you are not vulnerable.
Risk Assessment
Sensitive information contained in downloaded files can be exposed to other local users on the same system. The risk mainly affects multi-user environments where the temporary directory is shared.
Recommendation
Upgrade Gradle to version 7.0 or later, which moves system temporary directory usage to the Gradle User Home directory with restricted permissions. Alternatively, set a more restrictive umask or change the Java temporary directory by setting the java.io.tmpdir system property.
Other vulnerabilities in Gradle
See all- CVE-2016-6199Critical
The ObjectSocketWrapper.java in Gradle 2.12 has a vulnerability that allows remote attackers to execute arbitrary code via a crafted serialized object.
- CVE-2023-44387Low
Vulnerability in Gradle when copying or archiving symlinked files. Gradle resolves the symlink but applies the permissions of the symlink itself instead of the linked file, resulting in files having too many permissions. Fixed in versions 7.6.3, 8.4 and above.
- CVE-2023-35947Medium
Gradle has a path traversal vulnerability when unpacking Tar archives, which may lead to overwriting important files in locations where the Gradle process has write permissions. An attacker can exploit this flaw by controlling the source of an archive or modifying the build to interact with a malicious archive.
- CVE-2023-35946Medium
Gradle, a build automation tool, has a vulnerability that allows files to be written to unintended locations in the filesystem through specially crafted dependency coordinates. This could lead to poisoning the dependency cache or overwriting important files.
- CVE-2021-32751High
Gradle before version 7.2 contains a vulnerability to arbitrary code execution in start scripts generated by the `application` plugin and in the `gradlew` script. An attacker who can change environment variables for the user running the script can cause arbitrary code execution. This issue has been patched in Gradle 7.2 by removing the use of `eval` and requiring the use of the `bash` shell.
- CVE-2021-29428High
In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open permissions that allow multiple users to create and delete files within it. Gradle builds could be vulnerable to a local privilege escalation from an attacker quickly deleting and recreating files in the system temporary directory. This vulnerability impacted builds using precompiled script plugins written in Kotlin DSL and tests for Gradle plugins written using ProjectBuilder or TestKit. If you are on Windows or modern versions of macOS, you are not vulnerable. If you are on a Unix-like operating system with the "sticky" bit set on your system temporary directory, you are not vulnerable. The problem has been patched and released with Gradle 7.0. As a workaround, on Unix-like operating systems, ensure that the "sticky" bit is set. This only allows the original user (or root) to delete a file. If you are unable to change the permissions of the system temporary directory, you can move the Java temporary directory by setting the System Property `java.io.tmpdir`. The new path needs to limit permissions to the build user only. For additional details refer to the referenced GitHub Security Advisory.
Original NVD description (English source)
In Gradle before version 7.0, files created with open permissions in the system temporary directory can allow an attacker to access information downloaded by Gradle. Some builds could be vulnerable to a local information disclosure. Remote files accessed through TextResourceFactory are downloaded into the system temporary directory first. Sensitive information contained in these files can be exposed to other local users on the same system. If you do not use the `TextResourceFactory` API, you are not vulnerable. As of Gradle 7.0, uses of the system temporary directory have been moved to the Gradle User Home directory. By default, this directory is restricted to the user running the build. As a workaround, set a more restrictive umask that removes read access to other users. When files are created in the system temporary directory, they will not be accessible to other users. If you are unable to change your system's umask, you can move the Java temporary directory by setting the System Property `java.io.tmpdir`. The new path needs to limit permissions to the build user only.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

