CVE-2021-23331 Insecure Temporary File
Local attackers can read downloaded files due to insecure temporary file permissions in the Squareup Connect SDK.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-23331?
CVE-2021-23331 is a medium-severity vulnerability in com.squareup:connect, published on 3 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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 Note: This version of the SDK is end of life and no longer maintained, please upgrade to the latest version.
Which versions are affected by CVE-2021-23331?
2 open source packages ship an affected version, including com.squareup:connect. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
com.squareup:connect Maven | All versions to 2.20191120.0 | None |
com.squareup:connect Maven | All versions to 2.20191120.0 | None |
Products include Squareup Connect Java Software Development Kit.
How do I fix CVE-2021-23331?
No fix has been published for CVE-2021-23331 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-23331 being exploited?
There is no known exploitation of CVE-2021-23331 in the wild and no public exploit code.
Sources
Also known as GHSA-q4hm-fwc9-hmv6.