Vulnerability Details : CVE-2021-29428
Potential exploit
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.
Vulnerability category: Gain privilege
Products affected by CVE-2021-29428
- cpe:2.3:a:gradle:gradle:*:*:*:*:*:*:*:*
- cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-29428
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-29428
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
NIST | |
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST | |
8.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
GitHub, Inc. |
CWE ids for CVE-2021-29428
-
Opening temporary files without appropriate measures or controls can leave the file, its contents and any function that it impacts vulnerable to attack.Assigned by: security-advisories@github.com (Primary)
-
The product creates a temporary file in a directory whose permissions allow unintended actors to determine the file's existence or otherwise access that file.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-29428
-
https://github.com/gradle/gradle/security/advisories/GHSA-89qm-pxvm-p336
Local privilege escalation through system temporary directory · Advisory · gradle/gradle · GitHubExploit;Third Party Advisory
-
https://docs.gradle.org/7.0/release-notes.html#security-advisories
Gradle 7.0 Release NotesRelease Notes;Vendor Advisory
-
https://github.com/gradle/gradle/pull/15654
Refactor temporary directory usages by JLLeitschuh · Pull Request #15654 · gradle/gradle · GitHubPatch;Third Party Advisory
-
https://github.com/gradle/gradle/pull/15240
Refactor uses & creation of temp files/dirs to use unified API by JLLeitschuh · Pull Request #15240 · gradle/gradle · GitHubPatch;Third Party Advisory
Jump to