[asterisk-bugs] [Asterisk 0019185]: [patch] Asterisk crashes with a segfault if current host cannot be resolved via DNS.

[Asterisk Bug Tracker]

The following issue has been ASSIGNED. 
====================================================================== 
https://issues.asterisk.org/view.php?id=19185 
====================================================================== 
Reported By:                dswartz
Assigned To:                may
====================================================================== 
Project:                    Asterisk
Issue ID:                   19185
Category:                   Addons/chan_ooh323
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     assigned
Asterisk Version:           1.8.3.3 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2011-04-26 13:46 CDT
Last Modified:              2011-05-04 15:50 CDT
====================================================================== 
Summary:                    [patch] Asterisk crashes with a segfault if current
host cannot be resolved via DNS.
Description: 
int ooGetLocalIPAddress(char * pIPAddrs)
{
   int ret;
   struct hostent *hp;
   struct ast_hostent phost;
   char hostname[100];

   if(pIPAddrs == NULL)
      return -1; /* Need to find suitable return value */
   ret = gethostname(hostname, 100);
   if(ret == 0)
   {
      if (!(hp = ast_gethostbyname(hostname, &phost))) {
                        struct in_addr i;
                        memcpy(&i, hp->h_addr, sizeof(i));

If gethostname() fails, and then ast_gethostbyname() does as well, we will
go to the memcpy, dereferencing the null 'hp'.

======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0018278 [patch] ipv6 support in chan_ooh323
====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-05-04 15:50 svnbot         Status                   feedback => assigned
2011-05-04 15:50 svnbot         Assigned To              may213 => may       
======================================================================