CVE-2021-22538— Privilege escalation in RBAC system
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I. Basic Information for CVE-2021-22538
Vulnerability Information
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Vulnerability Title
Privilege escalation in RBAC system
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Seth Vargo Exposure Notification Verification Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Seth Vargo exposure-notifications-verification-server是 （Seth Vargo）开源的一个应用程序。这是Exposure Notifications验证服务器的参考实现，该服务器是更广泛的Google Exposure Notifications系统的一部分。 Seth Vargo Exposure Notification Verification Server (versions prior to 0.23.1) 存在安全漏洞，攻击者可利用该漏洞创
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Google LLC | Exposure Notifications Verification Server | stable ~ 0.23.0 | - |
II. Public POCs for CVE-2021-22538
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: Google LLC
- CVE-2022-3095
Incorrect parsing of the backslash characters in Dart librar - CVE-2022-3474
Bazel leaks user credentials through the remote assets API - CVE-2022-3421
Privilege escalation in Google Drive for Desktop on MacOS - CVE-2022-3171
Memory handling vulnerability in ProtocolBuffers Java core a - CVE-2022-1941
Out of Memory issue in ProtocolBuffers for cpp and python
Same weakness: CWE-20
V. Comments for CVE-2021-22538
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