Description (CNA)
Apache MINA SSHD is a Java library for client-side and server-side SSH. SSH servers can be configured to require multi-authentication schemes, for instance two different public keys, not just one. In OpenSSH, this would be done by setting in sshd_config AuthenticationMethods "publickey,publickey". Apache MINA SSHD provides an equivalent configuration mechanism. In Apache MINA SSHD versions up to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 the server code in component sshd-core does not enforce that the two public keys presented are different. A user can thus successfully authenticate with only one of the two key pairs required by presenting this single key twice. This is a partial authentication bypass. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Apache Software Foundation / Apache MINA SSHD | affected 0 before 2.20.0; affected 3.0.0-M1 before 3.0.0-M6 |
CWE
CWE-304
References
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.