CVE-2021-29433 Denial of service (via resource exhaustion) due to improper input validation

2021-04-1517:55:11

CWE-20

GitHub_M

www.cve.org

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

4.9 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

31.5%

JSON

Sydent is a reference Matrix identity server. In Sydent versions 2.2.0 and prior, sissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. A patch for the vulnerability is in version 2.3.0. No workarounds are known to exist.

CNA Affected

[
  {
    "product": "sydent",
    "vendor": "matrix-org",
    "versions": [
      {
        "status": "affected",
        "version": "<= 2.2.0"
      }
    ]
  }
]