CVE-2021-29428

NameCVE-2021-29428
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs987284

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gradle (PTS)stretch3.2.1-1vulnerable
buster4.4.1-6vulnerable
bullseye, sid4.4.1-13vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gradlesource(unstable)(unfixed)987284

Notes

[bullseye] - gradle <no-dsa> (Minor issue)
[buster] - gradle <no-dsa> (Minor issue)
[stretch] - gradle <no-dsa> (Minor issue; sticky bit on /tmp is set by default)
https://github.com/gradle/gradle/security/advisories/GHSA-89qm-pxvm-p336

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