CVE-2023-41335 Temporary storage of plaintext passwords during password changes in matrix synapse
Attackers with database access can read plaintext passwords from backups during password changes, exposing user credentials.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-41335?
CVE-2023-41335 is a low-severity vulnerability in Fedoraproject Fedora, published on 26 Sep 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration. These temporarily stored passwords are automatically erased after a 48-hour window. This issue has been addressed in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
Weakness: CWE-312
Which versions are affected by CVE-2023-41335?
3 open source packages ship an affected version, including matrix-synapse. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
matrix-synapse PyPI | From 1.66.0 | 1.93.0 |
matrix-synapse PyPI | From 1.66.0 | 1.93.0 |
matrix-synapse PyPI | From 1.66.0 | 1.93.0 |
Products include Fedoraproject Fedora, Matrix Synapse.
How do I fix CVE-2023-41335?
Upgrade matrix-synapse to 1.93.0 or later.
Is CVE-2023-41335 being exploited?
There is no known exploitation of CVE-2023-41335 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as GHSA-4f74-84v3-j9q5, PYSEC-2023-185, UBUNTU-CVE-2023-41335.