CVE-2022-23131 Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML

2021-11-2200:00:00

CWE-290

Zabbix

www.cve.org

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

10 High

AI Score

Confidence

High

0.97 High

EPSS

Percentile

99.7%

JSON

In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified. Malicious unauthenticated actor may exploit this issue to escalate privileges and gain admin access to Zabbix Frontend. To perform the attack, SAML authentication is required to be enabled and the actor has to know the username of Zabbix user (or use the guest account, which is disabled by default).

CNA Affected

[
  {
    "product": "Frontend",
    "vendor": "Zabbix",
    "versions": [
      {
        "status": "affected",
        "version": "5.4.0 - 5.4.8"
      },
      {
        "lessThan": "5.4.9*",
        "status": "unaffected",
        "version": "5.4.9",
        "versionType": "custom"
      }
    ]
  }
]