Account data access via OAuth MFA bypass
Published Jun 17, 2024 · Updated Aug 2, 2024
Authentication bypass in Firefly III before 6.1.17 allows remote attackers with valid passwords to access account data through OAuth. The OAuth authorization flow accepts a username and password and authorizes a client without completing the enabled MFA check. The attacker needs victim credentials and a valid, sequentially enumerable OAuth client identifier; the bypass exposes financial data through the API.
Summary
What happened
Authentication bypass in Firefly III before 6.1.17 allows remote attackers with valid passwords to access account data through OAuth. The OAuth authorization flow accepts a username and password and authorizes a client without completing the enabled MFA check. The attacker needs victim credentials and a valid, sequentially enumerable OAuth client identifier; the bypass exposes financial data through the API.
The record
- CVE
- CVE-2024-37893
- Published
- Jun 17, 2024
- Updated
- Aug 2, 2024
- Vendor
- Firefly III
- Product
- Firefly III
- Classifications
- CWE-288, CWE-287, T1078, T1110.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 17, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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=< 6.1.17
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- OAuth authorization MFA-bypass walkthroughproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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