Snort up to 2.4.4 http_inspect Pre-Processor access control

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Snort 2.4/2.4.1/2.4.2/2.4.3/2.4.4. Affected is an unknown function of the component http_inspect Pre-Processor. Such manipulation leads to access control. This vulnerability is documented as CVE-2006-2769. The attack can be executed remotely. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Snort 2.4/2.4.1/2.4.2/2.4.3/2.4.4. It has been rated as problematic. Affected by this issue is an unknown functionality of the component http_inspect Pre-Processor. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. The impact remains unknown. CVE summarizes:

The HTTP Inspect preprocessor (http_inspect) in Snort 2.4.0 through 2.4.4 allows remote attackers to bypass "uricontent" rules via a carriage return (\r) after the URL and before the HTTP declaration.

The bug was discovered 05/17/2006. The weakness was released 06/02/2006 by Blake Hartstein with Demarc Threat Research Team (Website). The advisory is shared for download at snort.org. This vulnerability is handled as CVE-2006-2769 since 06/01/2006. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

After even before and not, there has been an exploit disclosed. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 27448 (openSUSE 10 Security Update : snort (snort-1598)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 34046 (Snort URIContent Rules Detection Evasion).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at snort.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 4465.

The vulnerability is also documented in the databases at X-Force (26855), Exploit-DB (27931), Tenable (27448), SecurityFocus (BID 18200†) and OSVDB (25837†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.9
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: 27448
Nessus Name: openSUSE 10 Security Update : snort (snort-1598)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: snort.org
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

05/17/2006 🔍
05/31/2006 +14 days 🔍
05/31/2006 +0 days 🔍
05/31/2006 +0 days 🔍
05/31/2006 +0 days 🔍
06/01/2006 +0 days 🔍
06/02/2006 +1 days 🔍
06/02/2006 +0 days 🔍
06/02/2006 +0 days 🔍
06/02/2006 +0 days 🔍
06/02/2006 +0 days 🔍
06/11/2006 +9 days 🔍
06/19/2006 +8 days 🔍
10/17/2007 +485 days 🔍
06/21/2025 +6457 days 🔍

Sourcesinfo

Advisory: snort.org
Researcher: Blake Hartstein
Organization: Demarc Threat Research Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-2769 (🔍)
GCVE (CVE): GCVE-0-2006-2769
GCVE (VulDB): GCVE-100-2276
X-Force: 26855 - Snort uricontent rule bypass, Medium Risk
SecurityFocus: 18200 - Snort URIContent Rules Detection Evasion Vulnerability
Secunia: 20413 - Snort "http_inspect" Preprocessor Bypass Vulnerability, Moderately Critical
OSVDB: 25837 - Snort HTTP Inspect Pre-Processor Uricontent Bypass
SecurityTracker: 1016191 - Snort Lets Remote Users Bypass 'uricontent' Rules
Vulnerability Center: 11860 - Snort http_inspect Bypass Rules via \\r After the URL, Medium
Vupen: ADV-2006-2119

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/02/2006 13:27
Updated: 06/21/2025 23:01
Changes: 06/02/2006 13:27 (87), 06/07/2017 16:04 (13), 03/13/2021 06:20 (3), 05/24/2025 19:01 (15), 06/21/2025 23:01 (2)
Complete: 🔍
Cache ID: 216::103

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