[jira] [Created] (SSHD-925) See if SCP vulnerability CVE-2019-6111 applies and mitigate it if so

["Goldstein Lyor (JIRA)" <ji...@apache.org>]

Goldstein Lyor created SSHD-925:
-----------------------------------

             Summary: See if SCP vulnerability CVE-2019-6111 applies and mitigate it if so
                 Key: SSHD-925
                 URL: https://issues.apache.org/jira/browse/SSHD-925
             Project: MINA SSHD
          Issue Type: Improvement
    Affects Versions: 2.2.0
            Reporter: Goldstein Lyor
            Assignee: Goldstein Lyor


From [OpenSSH version 8.0 release notes|https://www.openssh.com/txt/release-8.0]
{quote}
This release contains mitigation for a weakness in the scp(1) tool and protocol (CVE-2019-6111): when copying files from a remote system to a local directory, scp(1) did not verify that the filenames that the server sent matched those requested by the client. This could allow a hostile server to create or clobber unexpected local files with attacker-controlled content.
{quote}

If indeed this vulnerability exists then also note the following
{quote}
The scp protocol relies on the remote shell for wildcard expansion, so there is no infallible way for the client's wildcard matching to perfectly reflect the server's. If there is a difference between client and server wildcard expansion, the client may refuse files from the server. For this reason, we have provided a new "-T" flag to scp that disables these client-side checks at the risk of reintroducing the attack described above.
{quote}



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