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: [email protected]
Reporter: [email protected]
CC: [email protected]
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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