Account impersonation via attacker-trusted DSA key
Published Mar 16, 2022 · Updated Apr 23, 2025
Authentication bypass in Wire Server before 2022-01-27 allows remote attackers to impersonate SAML SSO users with forged DSA signatures. The hsaml2 key pair fills its empty DSA slot from the signature itself and gives that attacker-supplied key precedence over the configured RSA key. Exploitation requires a SAML-enabled team plus its SSO login code, IdP EntityID, and target NameID; without SCIM, forged identities can also create accounts.
Summary
What happened
Authentication bypass in Wire Server before 2022-01-27 allows remote attackers to impersonate SAML SSO users with forged DSA signatures. The hsaml2 key pair fills its empty DSA slot from the signature itself and gives that attacker-supplied key precedence over the configured RSA key. Exploitation requires a SAML-enabled team plus its SSO login code, IdP EntityID, and target NameID; without SCIM, forged identities can also create accounts.
The record
- CVE
- CVE-2022-23610
- Published
- Mar 16, 2022
- Updated
- Apr 23, 2025
- Vendor
- Wire Swiss GmbH
- Product
- Wire Server
- Classifications
- CWE-347, T1606.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 16, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record 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=< 2022-01-27
- Affected versionversion=< 2.123.0
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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