ModSecurity 2.1.7/2.5.5/2.5.6/2.5.7/2.5.8 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

A vulnerability has been found in ModSecurity 2.1.7/2.5.5/2.5.6/2.5.7/2.5.8 and classified as critical. This vulnerability affects an unknown functionality of the component ModSecurity. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

The multipart processor in ModSecurity before 2.5.9 allows remote attackers to cause a denial of service (crash) via a multipart form datapost request with a missing part header name, which triggers a NULL pointer dereference.

The bug was discovered 03/11/2009. The weakness was released 03/11/2009 by Steve Grubb (ERNE) (Website). The advisory is available at redhat.com. This vulnerability was named CVE-2009-1902 since 06/03/2009. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 67125 (ModSecurity < 2.5.9 Multipart Request Header Name DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116306 (Fedora Update for mod_security (FEDORA-2009-2654,FEDORA-2009-2686)).

Upgrading to version 2.5.7 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49212), Tenable (67125) and Exploit-DB (8241). Entry connected to this vulnerability is available at 48407.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67125
Nessus Name: ModSecurity < 2.5.9 Multipart Request Header Name DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 63590
OpenVAS Name: Fedora Core 9 FEDORA-2009-2654 (mod_security)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ModSecurity 2.5.7

Timelineinfo

03/05/2009 🔍
03/11/2009 +6 days 🔍
03/11/2009 +0 days 🔍
03/11/2009 +0 days 🔍
03/12/2009 +1 days 🔍
03/12/2009 +0 days 🔍
03/12/2009 +0 days 🔍
03/31/2009 +18 days 🔍
06/03/2009 +64 days 🔍
06/03/2009 +0 days 🔍
07/02/2013 +1490 days 🔍
03/17/2015 +623 days 🔍
08/31/2019 +1628 days 🔍

Sourcesinfo

Advisory: redhat.com
Researcher: Steve Grubb (ERNE)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-1902 (🔍)
X-Force: 49212
Vulnerability Center: 21445 - ModSecurity < 2.5.9 Multipart Content Remote DoS Vulnerability, Medium
SecurityFocus: 34096 - ModSecurity Multiple Remote Denial of Service Vulnerabilities
Secunia: 34256 - ModSecurity Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 52553 - ModSecurity (mod_security) Multipart Request Header Name Handling DoS
Vupen: ADV-2009-0703

scip Labs: https://www.scip.ch/en/?labs.20130913
See also: 🔍

Entryinfo

Created: 03/17/2015 23:38
Updated: 08/31/2019 17:28
Changes: 03/17/2015 23:38 (85), 08/31/2019 17:28 (4)
Complete: 🔍

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