CVE-2021-22538 (GCVE-0-2021-22538)
Vulnerability from cvelistv5 – Published: 2021-03-31 21:10 – Updated: 2024-08-03 18:44
VLAI
EPSS
VEX
Title
Privilege escalation in RBAC system
Summary
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.
Severity
6.3 (Medium)
CWE
- CWE-20 - Improper Input Validation
Assigner
Google
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/google/exposure-notifications-… | x_refsource_CONFIRM |
| https://github.com/google/exposure-notifications-… | x_refsource_CONFIRM |
| https://github.com/google/exposure-notifications-… | x_refsource_CONFIRM |
| https://github.com/google/exposure-notifications-… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Google LLC | Exposure Notifications Verification Server |
Affected:
stable , ≤ 0.23.0
(custom)
|
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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