[Bug 3069] New: sftp issues with [ or ] in path name

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3069

            Bug ID: 3069
           Summary: sftp issues with [ or ] in path name
           Product: Portable OpenSSH
           Version: 8.0p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: sftp
          Assignee: unassigned-bugs at mindrot.org
          Reporter: andreas at canonical.com

openssh portable 8.0p1-4 from debian/ubuntu

Hi,

sftp can't fetch files that are inside a directory with [ or ]
characters. It can "cd" just fine into them, but fetching the file
fails:

$ sftp squid-ds216.lxd
Connected to squid-ds216.lxd.
sftp> ls -l
drwxrwxr-x    2 ubuntu   ubuntu          3 Sep 10 13:21 [pub]
drwxr-xr-x    2 ubuntu   ubuntu          2 Sep  5 20:40 bzr
sftp> cd \[pub\]
sftp> ls -l
-rw-rw-r--    1 ubuntu   ubuntu         12 Sep 10 13:21 hello.txt
sftp> get hello.txt
File "/home/ubuntu/[pub]/hello.txt" not found.

$ ssh squid-ds216.lxd
...

$ ls -lad \[pub\]
drwxrwxr-x 2 ubuntu ubuntu 3 Sep 10 13:21 '[pub]'

$ cd \[pub\]/

$ ls -la
total 10
drwxrwxr-x 2 ubuntu ubuntu  3 Sep 10 13:21 .
drwxr-xr-x 7 ubuntu ubuntu 17 Sep 10 13:21 ..
-rw-rw-r-- 1 ubuntu ubuntu 12 Sep 10 13:21 hello.txt

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