Authenticated MFA bypass via frontend-only validation
Published Apr 19, 2022 · Updated Aug 2, 2024
Authentication bypass in Abacus ERP releases before the listed 2022 service packs allows remote authenticated users to skip the second factor through crafted authentication requests. During login, the frontend alone checks approval from the Abacus Access mobile app, while the backend accepts session binding without verifying that approval. An attacker still needs a valid username and password, but can then obtain a fully authenticated session without the second factor, exposing the account’s permitted data and functions.
Summary
What happened
Authentication bypass in Abacus ERP releases before the listed 2022 service packs allows remote authenticated users to skip the second factor through crafted authentication requests. During login, the frontend alone checks approval from the Abacus Access mobile app, while the backend accepts session binding without verifying that approval. An attacker still needs a valid username and password, but can then obtain a fully authenticated session without the second factor, exposing the account’s permitted data and functions.
The record
- CVE
- CVE-2022-1065
- Published
- Apr 19, 2022
- Updated
- Aug 2, 2024
- Vendor
- Abacus Research AG
- Product
- Abacus ERP
- Classifications
- CWE-304, CWE-287, T1078
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 19, 2022CVE 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=R5 (service pack) <v2018* changes=[{"at":"R7 of 2020-04-15","status":"affected"}]
- Affected versionversion=R5 (service pack) <v2019* changes=[{"at":"R5 of 2020-03-15","status":"affected"}]
- Affected versionversion=v2020 <R6 of 2022-01-15
- Affected versionversion=v2021 <R4 of 2022-01-15
- Affected versionversion=v2022 <R1 of 2022-01-15
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
- Redguard Abacus MFA bypass proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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