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Vulnerability Details : CVE-2021-32751

Gradle is a build tool with a focus on build automation. In versions prior to 7.2, start scripts generated by the `application` plugin and the `gradlew` script are both vulnerable to arbitrary code execution when an attacker is able to change environment variables for the user running the script. This may impact those who use `gradlew` on Unix-like systems or use the scripts generated by Gradle in thieir application on Unix-like systems. For this vulnerability to be exploitable, an attacker needs to be able to set the value of particular environment variables and have those environment variables be seen by the vulnerable scripts. This issue has been patched in Gradle 7.2 by removing the use of `eval` and requiring the use of the `bash` shell. There are a few workarounds available. For CI/CD systems using the Gradle build tool, one may ensure that untrusted users are unable to change environment variables for the user that executes `gradlew`. If one is unable to upgrade to Gradle 7.2, one may generate a new `gradlew` script with Gradle 7.2 and use it for older versions of Gradle. Fpplications using start scripts generated by Gradle, one may ensure that untrusted users are unable to change environment variables for the user that executes the start script. A vulnerable start script could be manually patched to remove the use of `eval` or the use of environment variables that affect the application's command-line. If the application is simple enough, one may be able to avoid the use of the start scripts by running the application directly with Java command.
Publish Date : 2021-07-20 Last Update Date : 2021-07-30
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- CVSS Scores & Vulnerability Types

CVSS Score
8.5
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication ???
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 78

- Products Affected By CVE-2021-32751

# Product Type Vendor Product Version Update Edition Language
1 Application Gradle Gradle * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Gradle Gradle 1

- References For CVE-2021-32751

https://medium.com/dot-debug/the-perils-of-bash-eval-cc5f9e309cae
https://mywiki.wooledge.org/BashFAQ/048
https://github.com/gradle/gradle/security/advisories/GHSA-6j2p-252f-7mw8 CONFIRM

- Metasploit Modules Related To CVE-2021-32751

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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