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

2023-09-2618:55:24

Google

osv.dev

vulnerability

password change

database storage

server

credentials

authentication

regression

bug

patch

github

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

0.001 Low

EPSS

Percentile

24.3%

JSON

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.

CPENameOperatorVersion
matrix-synapseeq1.77.0
matrix-synapseeq1.78.0rc1
matrix-synapseeq1.82.0
matrix-synapseeq1.92.0rc1
matrix-synapseeq1.84.1
matrix-synapseeq1.76.0
matrix-synapseeq1.68.0
matrix-synapseeq1.78.0
matrix-synapseeq1.85.0rc1
matrix-synapseeq1.86.0rc2

Name	Operator	Version
matrix-synapse	eq	1.77.0
matrix-synapse	eq	1.78.0rc1
matrix-synapse	eq	1.82.0
matrix-synapse	eq	1.92.0rc1
matrix-synapse	eq	1.84.1
matrix-synapse	eq	1.76.0
matrix-synapse	eq	1.68.0
matrix-synapse	eq	1.78.0
matrix-synapse	eq	1.85.0rc1
matrix-synapse	eq	1.86.0rc2