Cisco Intrusion Prevention System up to 5.1(2) Filter

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Cisco Intrusion Prevention System up to 5.1(2). This affects an unknown function of the component Filter. Executing a manipulation can lead to an unknown weakness. This vulnerability is registered as CVE-2006-4911. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Cisco Intrusion Prevention System up to 5.1(2) and classified as critical. This vulnerability affects an unknown code block of the component Filter. As an impact it is known to affect integrity. CVE summarizes:

Unspecified vulnerability in Cisco IPS 5.0 before 5.0(6p2) and 5.1 before 5.1(2), when running in inline or promiscuous mode, allows remote attackers to bypass traffic inspection via a "crafted sequence of fragmented IP packets".

The weakness was published 09/21/2006 by Pratap Ramamurthy and Shai Rubin with Cisco (Website). The advisory is shared for download at cisco.com. This vulnerability was named CVE-2006-4911 since 09/20/2006. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (29058), SecurityFocus (BID 20127†), OSVDB (29036†), Secunia (SA22022†) and SecurityTracker (ID 1016891†). Similar entries are available at VDB-2558 and VDB-2559. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Unknown
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Patch: cisco.com

Timelineinfo

09/20/2006 🔍
09/20/2006 +0 days 🔍
09/20/2006 +0 days 🔍
09/20/2006 +0 days 🔍
09/20/2006 +0 days 🔍
09/21/2006 +1 days 🔍
09/21/2006 +0 days 🔍
09/21/2006 +0 days 🔍
09/22/2006 +0 days 🔍
09/28/2006 +6 days 🔍
01/25/2025 +6694 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: Pratap Ramamurthy, Shai Rubin
Organization: Cisco
Status: Confirmed

CVE: CVE-2006-4911 (🔍)
GCVE (CVE): GCVE-0-2006-4911
GCVE (VulDB): GCVE-100-2560
CERT: 🔍
X-Force: 29058 - Cisco IDS/IPS fragmented packet security bypass, Medium Risk
SecurityFocus: 20127 - Cisco IPS/IDS Fragmented Packets Inspection Bypass Vulnerability
Secunia: 22022 - Cisco Intrusion Prevention System Fragmented IP Packets Security Bypass, Moderately Critical
OSVDB: 29036 - Cisco IPS Fragmented IP Packet Sequence Detection Bypass
SecurityTracker: 1016891 - Cisco Intrusion Prevention System Lets Remote Users Deny Service or Evade Detection
Vulnerability Center: 12796 - [cisco-sa-20060920-ips] Cisco IPS Remote Bypass of Traffic Inspection via Fragmented IP Packets, Medium
Vupen: ADV-2006-3721

See also: 🔍

Entryinfo

Created: 09/22/2006 14:16
Updated: 01/25/2025 16:42
Changes: 09/22/2006 14:16 (78), 12/16/2016 14:51 (7), 01/25/2025 16:42 (17)
Complete: 🔍
Cache ID: 216::103

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