Linux Kernel up to 2.6.x IPv6 Fragmentation IP Fragment access control

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 2.6.x and classified as critical. Affected by this issue is some unknown functionality of the component IPv6 Fragmentation Handler. The manipulation as part of IP Fragment leads to access control. This vulnerability is listed as CVE-2006-4572. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 2.6.x (Operating System). It has been rated as critical. This issue affects an unknown part of the component IPv6 Fragmentation Handler. The manipulation as part of a IP Fragment leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

ip6_tables in netfilter in the Linux kernel before 2.6.16.31 allows remote attackers to (1) bypass a rule that disallows a protocol, via a packet with the protocol header not located immediately after the fragment header, aka "ip6_tables protocol bypass bug;" and (2) bypass a rule that looks for a certain extension header, via a packet with an extension header outside the first fragment, aka "ip6_tables extension header bypass bug."

The bug was discovered 10/24/2006. The weakness was presented 11/07/2006 by Marc Dowd with McAfee (Website). It is possible to read the advisory at kernel.org. The identification of this vulnerability is CVE-2006-4572 since 09/06/2006. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 10 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 28005 (Ubuntu 5.10 / 6.06 LTS / 6.10 : linux-source-2.6.12/2.6.15/2.6.17 vulnerabilities (USN-416-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165110 (SUSE Security Update for Kernel (SUSE-SA:2006:079)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (30065), Tenable (28005), SecurityFocus (BID 20955†), OSVDB (30066†) and Secunia (SA24098†). kernel.org is providing further details. See VDB-2464, VDB-2506, VDB-2752 and VDB-2754 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 28005
Nessus Name: Ubuntu 5.10 / 6.06 LTS / 6.10 : linux-source-2.6.12/2.6.15/2.6.17 vulnerabilities (USN-416-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 840099
OpenVAS Name: Ubuntu Update for libxml2 USN-2214-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: kernel.org
ISS Proventia IPS: 🔍

Timelineinfo

09/06/2006 🔍
10/24/2006 +48 days 🔍
10/24/2006 +0 days 🔍
11/03/2006 +10 days 🔍
11/06/2006 +3 days 🔍
11/07/2006 +1 days 🔍
11/07/2006 +0 days 🔍
11/07/2006 +0 days 🔍
11/08/2006 +0 days 🔍
02/12/2007 +96 days 🔍
02/28/2007 +16 days 🔍
11/10/2007 +255 days 🔍
07/15/2019 +4265 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Marc Dowd
Organization: McAfee
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-4572 (🔍)
GCVE (CVE): GCVE-0-2006-4572
GCVE (VulDB): GCVE-100-2663
X-Force: 30065
SecurityFocus: 20955 - Linux Kernel Multiple IPV6 Packet Filtering Bypass Vulnerabilities
Secunia: 24098 - Ubuntu update for kernel, Moderately Critical
OSVDB: 30066 - Linux Kernel netfilter Fragmented IPv6 Packet Filtering Bypass
Vulnerability Center: 14460 - Linux Kernel ip6_tables Multiple Packet Filtering Bypass Vulnerabilities, High
Vupen: ADV-2006-4386

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/08/2006 10:04
Updated: 07/15/2019 20:44
Changes: 11/08/2006 10:04 (100), 07/15/2019 20:44 (1)
Complete: 🔍
Cache ID: 216:A64:103

Be aware that VulDB is the high quality source for vulnerability data.

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