Linux Kernel up to 2.6.x IPv6 Stack /proc/net/ip6_flowlabel resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 2.6.x. The impacted element is an unknown function of the file /proc/net/ip6_flowlabel of the component IPv6 Stack. This manipulation causes resource management. This vulnerability is tracked as CVE-2006-5619. The attack is only possible within the local network. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 2.6.x (Operating System). Affected by this vulnerability is an unknown functionality of the file /proc/net/ip6_flowlabel of the component IPv6 Stack. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

The seqfile handling (ip6fl_get_n function in ip6_flowlabel.c) in Linux kernel 2.6 up to 2.6.18-stable allows local users to cause a denial of service (hang or oops) via unspecified manipulations that trigger an infinite loop while searching for flowlabels.

The bug was discovered 10/30/2006. The weakness was disclosed 11/01/2006 by David S. Miller (Website). It is possible to read the advisory at kernel.org. This vulnerability is known as CVE-2006-5619 since 10/31/2006. The attack can only be done within the local network. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 36838 (CentOS 4 : kernel (CESA-2007:0014)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115509 (Red Hat Kernel Security Update (RHSA-2007:0014)).

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 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (29970), Tenable (36838), SecurityFocus (BID 20847†), OSVDB (30002†) and Secunia (SA22754†). The entries VDB-2551, VDB-2589, VDB-2661 and VDB-2714 are pretty similar. 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: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 36838
Nessus Name: CentOS 4 : kernel (CESA-2007:0014)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 57711
OpenVAS Name: Debian Security Advisory DSA 1233-1 (kernel-source-2.6.8)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: kernel.org

Timelineinfo

10/30/2006 🔍
10/31/2006 +1 days 🔍
10/31/2006 +0 days 🔍
10/31/2006 +0 days 🔍
11/01/2006 +1 days 🔍
11/01/2006 +0 days 🔍
11/01/2006 +0 days 🔍
11/02/2006 +0 days 🔍
11/10/2006 +8 days 🔍
01/31/2007 +82 days 🔍
02/04/2007 +4 days 🔍
04/23/2009 +809 days 🔍
04/25/2026 +6211 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: David S. Miller
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-5619 (🔍)
GCVE (CVE): GCVE-0-2006-5619
GCVE (VulDB): GCVE-100-2647

OVAL: 🔍

X-Force: 29970 - Linux kernel seqfile IPv6 flowlabel denial of service, Medium Risk
SecurityFocus: 20847 - Linux Kernel IPV6 Seqfile Handling Local Denial of Service Vulnerability
Secunia: 22754 - rPath update for kernel, Not Critical
OSVDB: 30002 - Linux Kernel ip6_flowlabel.c ip6fl_get_n Function IPv6 Flow Label Handling DoS
Vulnerability Center: 14197 - Linux Kernel 2.6-2.6.18-Stable Local DoS via an Infinite Loop, Medium
Vupen: ADV-2006-4297

See also: 🔍

Entryinfo

Created: 11/02/2006 10:13
Updated: 04/25/2026 23:01
Changes: 11/02/2006 10:13 (99), 09/05/2019 13:35 (3), 04/25/2026 23:01 (16)
Complete: 🔍
Cache ID: 216::103

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