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* [Bug dynamic-link/14839] New: Access behind terminating nullbyte of the environment?
@ 2012-11-13 22:40 jannhorn at googlemail dot com
  2012-11-13 22:49 ` [Bug dynamic-link/14839] " jannhorn at googlemail dot com
  2014-06-14 11:07 ` fweimer at redhat dot com
  0 siblings, 2 replies; 3+ messages in thread
From: jannhorn at googlemail dot com @ 2012-11-13 22:40 UTC (permalink / raw)
  To: glibc-bugs

http://sourceware.org/bugzilla/show_bug.cgi?id=14839

             Bug #: 14839
           Summary: Access behind terminating nullbyte of the environment?
           Product: glibc
           Version: 2.13
            Status: NEW
          Severity: minor
          Priority: P2
         Component: dynamic-link
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jannhorn@googlemail.com
    Classification: Unclassified


>From rtld.c:

    case 10:
      /* Mask for the important hardware capabilities.  */
      if (memcmp (envline, "HWCAP_MASK", 10) == 0)
        GLRO(dl_hwcap_mask) = __strtoul_internal (&envline[11], NULL,
                              0, 0);

As far as I can see, there is no check that makes sure that the tenth byte
isn't already the terminating nullbyte.

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* [Bug dynamic-link/14839] Access behind terminating nullbyte of the environment?
  2012-11-13 22:40 [Bug dynamic-link/14839] New: Access behind terminating nullbyte of the environment? jannhorn at googlemail dot com
@ 2012-11-13 22:49 ` jannhorn at googlemail dot com
  2014-06-14 11:07 ` fweimer at redhat dot com
  1 sibling, 0 replies; 3+ messages in thread
From: jannhorn at googlemail dot com @ 2012-11-13 22:49 UTC (permalink / raw)
  To: glibc-bugs

http://sourceware.org/bugzilla/show_bug.cgi?id=14839

Jann Horn <jannhorn at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Jann Horn <jannhorn at googlemail dot com> 2012-11-13 22:48:43 UTC ---
Ah, didn't see the `if (envline[len] != '=')`. Sorry.

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^ permalink raw reply	[flat|nested] 3+ messages in thread

* [Bug dynamic-link/14839] Access behind terminating nullbyte of the environment?
  2012-11-13 22:40 [Bug dynamic-link/14839] New: Access behind terminating nullbyte of the environment? jannhorn at googlemail dot com
  2012-11-13 22:49 ` [Bug dynamic-link/14839] " jannhorn at googlemail dot com
@ 2014-06-14 11:07 ` fweimer at redhat dot com
  1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-14 11:07 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=14839

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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end of thread, other threads:[~2014-06-14 11:07 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-11-13 22:40 [Bug dynamic-link/14839] New: Access behind terminating nullbyte of the environment? jannhorn at googlemail dot com
2012-11-13 22:49 ` [Bug dynamic-link/14839] " jannhorn at googlemail dot com
2014-06-14 11:07 ` fweimer at redhat dot com

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