[Bug 64729] New: An NPD bug

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=64729

            Bug ID: 64729
           Summary: An NPD bug
           Product: Apache httpd-2
           Version: 2.4-HEAD
          Hardware: PC
                OS: Mac OS X 10.1
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_dav
          Assignee: bugs@httpd.apache.org
          Reporter: cwangch@connect.ust.hk
                CC: byshen@eng.ucsd.edu
  Target Milestone: ---

Created attachment 37443
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=37443&action=edit
Clear explanation of bug trace

Hi guys,

We have found a NULL Pointer Dereference Bug as follows. This bug has the same
cause as [BUG 64728](https://bz.apache.org/bugzilla/show_bug.cgi?id=64728)

Bug description: `dav_fs_insert_prop` dereferences `info` at line 2006 in the
form `info->name`, while `info` can be null.

Root cause: Although it is claimed that info is not equal to NULL in the
annotation, we check the feasibility of the control flow path and find that
`modules/dav/main/liveprop.c` can set `*info = NULL` at line 127 in
`dav_get_liveprop_info` defined in `modules/dav/main/liveprop.c`

It would be better if `info` is checked to determined whether it is NULL or not
exactly before line 1991 in modules/dav/fs/repos.c. 

For the convenience, we attach the calling traces in the attachements. The
marks can demonstrate that it is a true bug.

Looking forward to your reply. Hope it can be fixed to assure the security and
quality of the software. Thank you for your effort and have a nice day.

Best regards

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[Bug 64729] An NPD bug

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=64729

Joe Orton <jo...@redhat.com> changed:

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

--- Comment #1 from Joe Orton <jo...@redhat.com> ---
Again: please STOP filing this stuff in Bugzilla.

To demonstrate to us that a bug exists, you need to show us HOW to reproduce
the issue using a sequence of HTTP requests.  If all you have is the output of
a static analyzer, you have not even started work.  You need to understand the
code paths, work out how (or whether) they can be triggered using an HTTP (or
WebDAV) client.

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