Mod Security 1.7.4 off-by-one

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0$0-$5k0.00

A vulnerability classified as critical has been found in Mod Security 1.7.4. This affects an unknown code. The manipulation with an unknown input leads to a off-by-one vulnerability. CWE is classifying the issue as CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Off-by-one buffer overflow in ModSecurity (mod_security) 1.7.4 for Apache 2.x, when SecFilterScanPost is enabled, allows remote attackers to execute arbitrary code via crafted POST requests.

The bug was discovered 03/15/2004. The weakness was disclosed 12/31/2004 by Evgeny Legerov with S-Quadra as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is uniquely identified as CVE-2004-1765 since 03/10/2005. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 37595 (FreeBSD : ModSecurity for Apache 2.x remote off-by-one overflow (c2e10368-77ab-11d8-b9e8-00e04ccb0a62)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading 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 (15489) and Tenable (37595). The entry 8904 is pretty similar.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 37595
Nessus Name: FreeBSD : ModSecurity for Apache 2.x remote off-by-one overflow (c2e10368-77ab-11d8-b9e8-00e04ccb0a62)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 52448
OpenVAS Name: FreeBSD Ports: mod_security
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/15/2004 🔍
03/15/2004 +0 days 🔍
03/16/2004 +1 days 🔍
03/17/2004 +1 days 🔍
03/17/2004 +0 days 🔍
12/31/2004 +289 days 🔍
12/31/2004 +0 days 🔍
03/10/2005 +69 days 🔍
04/23/2009 +1505 days 🔍
05/10/2009 +17 days 🔍
02/27/2015 +2119 days 🔍
09/03/2019 +1649 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Evgeny Legerov
Organization: S-Quadra
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2004-1765 (🔍)
X-Force: 15489
Vulnerability Center: 21951 - ModSecurity 1.7.4 for Apache 2.x Off-by-One Buffer Overflow Allows Remote Code Execution, Medium
SecurityFocus: 9885 - Apache Mod_Security Module SecFilterScanPost Off-By-One Buffer Overflow Vulnerability
Secunia: 11138 - mod_security POST Request Processing Off-By-One Vulnerability, Moderately Critical
OSVDB: 4304 - Apache - Mod_Security - Module SecFilterScanPost Off-By-One - Buffer Overflow Issue

See also: 🔍

Entryinfo

Created: 02/27/2015 16:05
Updated: 09/03/2019 09:49
Changes: 02/27/2015 16:05 (77), 09/03/2019 09:49 (5)
Complete: 🔍
Cache ID: 3:787:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!