Username enumeration via password change response discrepancy
Published Dec 23, 2021 · Updated Aug 3, 2024
Response discrepancy in SonicWall SMA 100 10.x allows remote attackers to enumerate usernames through password change requests. The password change API returns observably different server responses for valid and invalid usernames, exposing account existence. No authentication or user interaction is required; the consequence is username disclosure, not credential or application-data access.
Summary
What happened
Response discrepancy in SonicWall SMA 100 10.x allows remote attackers to enumerate usernames through password change requests. The password change API returns observably different server responses for valid and invalid usernames, exposing account existence. No authentication or user interaction is required; the consequence is username disclosure, not credential or application-data access.
The record
- CVE
- CVE-2021-20049
- Published
- Dec 23, 2021
- Updated
- Aug 3, 2024
- Vendor
- SonicWall
- Product
- Secure Mobile Access (SMA) 100 Series
- Classifications
- CWE-204, CWE-203, T1087
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 23, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.2.0.8-37sv and earlier
- Affected versionversion=10.2.1.2-24sv and earlier
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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