WebAuthn assertion replay permits second-factor bypass in Psono Server
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| esaqa GmbH | Psono | unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Esaqa | Psono |
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Vendor Solution
Upgrade to Psono Server 7.2.4 or later.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.408% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Esaqa
Esaqa psono |
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| Vendors & Products |
Esaqa
Esaqa psono |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Psono Server CE & EE versions 3.1.0 through 7.2.3 did not consume a stored WebAuthn challenge after assertion verification. An unauthenticated remote attacker who possessed the user's password and one captured valid WebAuthn assertion could replay that assertion with separate login tokens while the stored challenge remained unchanged, bypassing the WebAuthn second factor. The attack required capture of a valid assertion and did not itself disclose plaintext secrets. | |
| Title | WebAuthn assertion replay permits second-factor bypass in Psono Server | |
| Weaknesses | CWE-294 | |
| References |
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| Metrics |
cvssV3_1
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