CVE-2021-21331 DataDog API Client contains a Local Information Disclosure Vulnerability
Local attackers can read sensitive files downloaded by the DataDog Java API client due to insecure temporary file permissions on multi-user systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-21331?
CVE-2021-21331 is a low-severity vulnerability in datadog-api-client-java, published on 3 Mar 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Java client for the Datadog API before version 1.0.0-beta.9 has a local information disclosure of sensitive information downloaded via the API using the API Client. The Datadog API is executed on a unix-like system with multiple users. The API is used to download a file containing sensitive information. This sensitive information is exposed locally to other users. This vulnerability exists in the API Client for version 1 and 2. The method `prepareDownloadFilecreates` creates a temporary file with the permissions bits of `-rw-r--r--` on unix-like systems. On unix-like systems, the system temporary directory is shared between users. As such, the contents of the file downloaded via the `downloadFileFromResponse` method will be visible to all other users on the local system. Analysis of the finding determined that the affected code was unused, meaning that the exploitation likelihood is low. The unused code has been removed, effectively mitigating this issue. This issue has been patched in version 1.0.0-beta.9. As a workaround one may specify `java.io.tmpdir` when starting the JVM with the flag `-Djava.io.tmpdir`, specifying a path to a directory with `drw-------` permissions owned by `dd-agent`.
Which versions are affected by CVE-2021-21331?
2 open source packages ship an affected version, including com.datadoghq:datadog-api-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
com.datadoghq:datadog-api-client Maven | From 1.0.0-beta.6 | 1.0.0-beta.9 |
com.datadoghq:datadog-api-client Maven | From 1.0.0-beta.6 | 1.0.0-beta.9 |
Products include Datadoghq Datadog-Api-Client-Java.
How do I fix CVE-2021-21331?
Upgrade com.datadoghq:datadog-api-client to 1.0.0-beta.9 or later.
Is CVE-2021-21331 being exploited?
There is no known exploitation of CVE-2021-21331 in the wild and no public exploit code.
Sources
Also known as GHSA-2cxf-6567-7pp6.