bugzilla-daemon at mindrot.org
2023-May-27 03:21 UTC
[Bug 3576] New: The sftp-server does not provide the feature of changing expired passwords, which is provided by the sshd.
https://bugzilla.mindrot.org/show_bug.cgi?id=3576
Bug ID: 3576
Summary: The sftp-server does not provide the feature of
changing expired passwords, which is provided by the
sshd.
Product: Portable OpenSSH
Version: -current
Hardware: All
OS: Linux
Status: NEW
Severity: security
Priority: P5
Component: sftp-server
Assignee: unassigned-bugs at mindrot.org
Reporter: rmsh1216 at 163.com
Hi!
When I try to ssh into an account with an expired password, I'm
reminded and can change the password, as shown below,
```
# ssh user at ipaddress
Authorized users only. All activities may be monitored and reported.
user at ipaddress's password:
You are required to change your password immediately (administrator
enforced).
Authorized users only. All activities may be monitored and reported.
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user user.
Changing password for user.
Current password:
```
But when I log in using sftp, I'm not prompted to change the password,
but just disconnect.
```
# sftp user at ipaddress
Authorized users only. All activities may be monitored and reported.
user at ipaddress's password:
You are required to change your password immediately (administrator
enforced).
subsystem request failed on channel 0
Connection closed
```
I have some doubts about this, if sftp-server is designed like this,
please let me know the reason.
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bugzilla-daemon at mindrot.org
2023-Jun-21 05:19 UTC
[Bug 3576] The sftp-server does not provide the feature of changing expired passwords, which is provided by the sshd.
https://bugzilla.mindrot.org/show_bug.cgi?id=3576
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |WONTFIX
Status|NEW |RESOLVED
CC| |djm at mindrot.org
--- Comment #1 from Damien Miller <djm at mindrot.org> ---
Unfortunately this is not feasible to fix - the sftp protocol
(https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-02)
has no provision for password management, so it must all be done out of
band.
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