https://bugzilla.mindrot.org/show_bug.cgi?id=3048
Bug ID: 3048
Summary: ssh reads from the wrong directory in user namespace
Product: Portable OpenSSH
Version: 7.9p1
Hardware: amd64
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: ssh
Assignee: [email protected]
Reporter: [email protected]
ssh(1) says that
-i identity_file
Selects a file from which the identity (private key) for
public key authentication is read. The default is ~/.ssh/id_dsa,
~/.ssh/id_ecdsa, ~/.ssh/id_ed25519 and ~/.ssh/id_rsa.
Identity files may also be specified on a per-host basis in the con‐
figuration file. It is possible to have multiple -i
options (and multiple identities specified in configuration files).
If no certificates have been explicitly specified by the
CertificateFile directive, ssh will also try to load certificate
information from the filename obtained by appending
-cert.pub to identity filenames.
but it seems it does something else
holst@hholst-lt:~$ unshare -r
root@hholst-lt:~# echo "~ expands to" ~ "and \$HOME is" $HOME
~ expands to /home/holst and $HOME is /home/holst
root@hholst-lt:~# ssh sdf.org
Could not create directory '/root/.ssh'.
load pubkey "/root/.ssh/id_rsa": Permission denied
load pubkey "/root/.ssh/id_rsa": Permission denied
load pubkey "/root/.ssh/id_dsa": Permission denied
load pubkey "/root/.ssh/id_dsa": Permission denied
load pubkey "/root/.ssh/id_ecdsa": Permission denied
load pubkey "/root/.ssh/id_ecdsa": Permission denied
load pubkey "/root/.ssh/id_ed25519": Permission denied
load pubkey "/root/.ssh/id_ed25519": Permission denied
load pubkey "/root/.ssh/id_xmss": Permission denied
load pubkey "/root/.ssh/id_xmss": Permission denied
The authenticity of host 'sdf.org (205.166.94.16)' can't be
established.
ED25519 key fingerprint is
SHA256:ZjwbO7AU8rHJExYrmZS2LqGZ7WfdoELfMrF54W92PYA.
Are you sure you want to continue connecting (yes/no)? n
Please type 'yes' or 'no': no
Host key verification failed.
root@hholst-lt:~#
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