CVE-2023-41335 Temporary storage of plaintext passwords during password changes in matrix synapse

2023-09-2620:51:29

CWE-312

GitHub_M

www.cve.org

cve-2023-41335

password changes

matrix synapse

database security

version 1.93.0

CVSS3

3.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

4.8

Confidence

High

EPSS

0.001

Percentile

30.1%

JSON

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.

CNA Affected

[
  {
    "vendor": "matrix-org",
    "product": "synapse",
    "versions": [
      {
        "version": ">= 1.66.0, < 1.93.0",
        "status": "affected"
      }
    ]
  }
]