CVE-2021-22538
CVSS V2 Medium 6.5
CVSS V3 High 8.8
Description
A privilege escalation vulnerability impacting the Google Exposure Notification Verification Server (versions prior to 0.23.1), allows an attacker who (1) has UserWrite permissions and (2) is using a carefully crafted request or malicious proxy, to create another user with higher privileges than their own. This occurs due to insufficient checks on the allowed set of permissions. The new user creation event would be captured in the Event Log.
Overview
- CVE ID
- CVE-2021-22538
- Assigner
- cve-coordination@google.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-31T21:15:16
- Last Modified Date
- 2021-04-06T14:11:52
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:google:exposure_notifications_verification_server:*:*:*:*:*:*:*:* | 1 | OR | 0.23.1 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 6.5
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 8.8
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/google/exposure-notifications-verification-server/commit/eb8cf40b12dbe79304f1133c06fb73419383cd95 | Patch Third Party Advisory |
| https://github.com/google/exposure-notifications-verification-server/releases/tag/v0.23.1 | Release Notes Third Party Advisory |
| https://github.com/google/exposure-notifications-verification-server/releases/tag/v0.24.0 | Release Notes Third Party Advisory |
| https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-5v95-v8c8-3rh6 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-22538 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22538 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:17:08 | Added to TrackCVE | |||
| 2022-12-06 00:47:33 | security@google.com | cve-coordination@google.com | CVE Assigner | updated |
| 2022-12-06 00:47:33 | 2021-03-31T21:15Z | 2021-03-31T21:15:16 | CVE Published Date | updated |
| 2022-12-06 00:47:33 | 2021-04-06T14:11:52 | CVE Modified Date | updated | |
| 2022-12-06 00:47:33 | Analyzed | Vulnerability Status | updated |