[Bug 3786] New: openssh client no longer connects to dropbear server

bugzilla-daemon at mindrot.org bugzilla-daemon at mindrot.org
Sun Feb 9 19:24:25 AEDT 2025


https://bugzilla.mindrot.org/show_bug.cgi?id=3786

            Bug ID: 3786
           Summary: openssh client no longer connects to dropbear server
           Product: Portable OpenSSH
           Version: 9.9p1
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: niki2inbox at gmail.com

As of version 9.9 the client does not connect to dropbear running on
OpenWRT.
With client 9.8 I am able to connect.

$ ./ssh root at 192.168.0.1
ssh_dispatch_run_fatal: Connection to 192.168.0.1 port 22: error in
libcrypto
$

Doing -vvv does not print anything else meaningful.

My client config:

Host 192.168.0.1
    PubkeyAcceptedAlgorithms +ssh-rsa
    HostkeyAlgorithms +ssh-rsa

The dropbear server arguments:

/usr/sbin/dropbear -F -P /var/run/dropbear.1.pid -p 22 -K 300 -T 3

SSH_ERR_LIBCRYPTO_ERROR is returned from sshkey_pkey_digest_verify in
sshkey.c

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