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Bug 94585 - net-im/ntame-998020954 insecure temporary file creation
Summary: net-im/ntame-998020954 insecure temporary file creation
Status: RESOLVED INVALID
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Auditing (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-05-31 00:14 UTC by Romang
Modified: 2005-05-31 05:58 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Romang 2005-05-31 00:14:31 UTC
Hello,

In ntaim.h

#define DEBUG_PERM 0644
#define DEBUG_PATH "/tmp/ntaim-debug.log"

Then in debug.c

24 void debug_init()
25 {
26    struct timeval tv;
27    int temp;
28 
29    debug_fd = open(DEBUG_PATH, O_WRONLY|O_CREAT|O_APPEND, DEBUG_PERM);
30    if (debug_fd < 0)
31      {
32         write(1, "Cannot open debug file.\n", 24);
33         write(1, "[ Press enter to continue ]\n", 28);
34         read(0, &temp, 3);
35         return;
36      }
37    gettimeofday(&tv, NULL);
38    debug_instance = tv.tv_sec;
39    write(debug_fd, "nTAIM instance ", 15);
40    {
41       char *tmpstr = (char*)alloca(11);
42       itoa(tmpstr, 11, debug_instance);
43       write(debug_fd, tmpstr, strlen(tmpstr));
44    }
45    write(debug_fd, " started\n", 9);
46    
47    return;
48 }

The ntname debug is, in my point off view, sensible to symlink attack.
The temporary file "tmp/ntaim-debug.log" is know and there is no check
if the file already exist or not. Just checking O_WRONLY|O_CREAT|O_APPEND.

Regards.
Comment 1 Tavis Ormandy (RETIRED) gentoo-dev 2005-05-31 00:39:43 UTC
that code is #ifdef DEBUG'ed out, the ebuild never defines that macro so a user 
would have to add that to their CFLAGS in order to ever reach the code.

Nevertheless, perhaps the O_APPEND should be replaced with O_EXCL or DEBUG_PATH 
set to "ntaim-debug.log" instead, I would suggest reassigning to net-im herd.
Comment 2 Tavis Ormandy (RETIRED) gentoo-dev 2005-05-31 05:58:06 UTC
conferred with security team, marking INVALID.