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  1. MINA SSHD
  2. SSHD-925

See if SCP vulnerability CVE-2019-6111 applies and mitigate it if so

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Not A Problem
    • 2.2.0
    • None
    • Important

    Description

      From OpenSSH version 8.0 release notes

      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.

      If indeed this vulnerability exists then also note the following

      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.

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            lgoldstein Lyor Goldstein
            lgoldstein Lyor Goldstein
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              Updated:
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