GHSA-4f74-84v3-j9q5

matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes

Source: GitHub Advisory Database (reviewed) Low CVE-2023-41335

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	matrix-synapse	>= 1.66.0, < 1.93.0	1.93.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact 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. ### Patches https://github.com/matrix-org/synapse/pull/16272 ### References This bug was due to a regression in https://github.com/matrix-org/synapse/pull/13188.

References

External links from the advisory. They lead to third-party sites.