[Bug 1023360] Re: Comments longer than 1024 chars break sshd_config

[Nils Toedtmann]

Upstream provided a patch (
https://bugzilla.mindrot.org/attachment.cgi?id=2174 ). It will go into
OpenSSH 6.1.

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https://bugs.launchpad.net/bugs/1023360

Title:
  Comments longer than 1024 chars break sshd_config

Status in “openssh” package in Ubuntu:
  New

Bug description:
  When sshd_config contains a comment of more than 1023 chars, it treats
  char 1024+ as valid configuration. That usually breaks the config, or
  (in case there accidentally is valid sshd_config syntax) is unwanted.

  To verify the bug, apply appended patch to sshd_config (that prepends
  a long comment) and try to start ssh. You will see this:

    $ sudo /usr/sbin/sshd 
    /etc/ssh/sshd_config: line 2: Bad configuration option: ThisIsAnInvalidOption
    /etc/ssh/sshd_config: terminating, 1 bad configuration options

  Note that it complains about line 2 though the offending comment is in
  line 1.

  It is worth mentioning that active configuration lines longer than
  1023 chars work fine. (I discovered this bug when i commented out a
  long "Match Address" list)

  
  This bug strikes at on 
   * openssh-server 1:5.3p1-3ubuntu7 (Ubuntu 10.04 LTS)
   * openssh-server 1:5.8p1-7ubuntu1 (Ubuntu 11.10)
   * openssh-server 1:5.9p1-5ubuntu1 (Ubuntu 12.04 LTS)

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