Re: GNU/Linux 'info Buffer Overflow

Valdis.Kletnieks_at_vt.edu
Date: 08/06/04

  • Next message: Michael Scheidell: "Anyone know IBM's security address?"
    To: Josh Martin <skizzles@gmail.com>
    Date: Fri, 06 Aug 2004 16:05:47 -0400
    
    
    

    On Fri, 06 Aug 2004 00:46:21 -0000, Josh Martin <skizzles@gmail.com> said:

    > Package: info
    > Version: 4.7-2.1
    > Severity: grave
    > Tags: security
    > Justification: user security hole

    > This buffer overflow is very trivial to leverage as there are several
    > bytes available (10-15+). It may be possible that arbitary system calls
    > could be made though this hole. It is also possible to leverage this
    > from the command line using the --restore=FILENAME flag, and need not
    > have the program running. Although it is not running as suid, or as a
    > daemon, in a case where info is being used as a public service, it may
    > be a security problem.

    Well.. it may be a problem if you can convince root (or somebody else not
    yourself) to go to an 'info' page and enter 'f' and 225 bytes and hit return,
    or to convince root to run a 'info --restore=' command. Barring that,
    I'm failing to see how it's a "grave" severity - unless there's a way to leverage
    it or social-engineer it that I'm missing, if this is "grave" then *every* bug that
    results in a SIGSEGV is grave.....

    
    



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