Linux Kernel 2.6.20.2 Filter memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 2.6.20.2. This impacts an unknown function of the component Filter. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2007-1497. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel 2.6.20.2 (Operating System). This affects an unknown code of the component Filter. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. The summary by CVE is:

nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.

The issue has been introduced in 02/05/2007. The weakness was shared 03/14/2007 by Patrick with Kernel.org (Website). It is possible to read the advisory at kernel.org. This vulnerability is uniquely identified as CVE-2007-1497 since 03/16/2007. 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.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 37 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43641 (CentOS 5 : kernel (CESA-2007:0347)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156097 (Oracle Enterprise Linux Update for Kernel (ELSA-2007-0347)).

Upgrading to version 2.6.20.3 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.

The vulnerability is also documented in the databases at X-Force (33210), Tenable (43641), SecurityFocus (BID 23976†), OSVDB (33028†) and Secunia (SA24492†). The entries VDB-2978, VDB-3041, VDB-3146 and VDB-3293 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 43641
Nessus Name: CentOS 5 : kernel (CESA-2007:0347)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 58340
OpenVAS Name: Debian Security Advisory DSA 1289-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 2.6.20.3
Patch: kernel.org

Timelineinfo

02/05/2007 🔍
03/13/2007 +36 days 🔍
03/13/2007 +0 days 🔍
03/14/2007 +1 days 🔍
03/14/2007 +0 days 🔍
03/14/2007 +0 days 🔍
03/16/2007 +1 days 🔍
03/16/2007 +0 days 🔍
03/26/2007 +10 days 🔍
05/20/2007 +55 days 🔍
03/15/2021 +5048 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Patrick
Organization: Kernel.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-1497 (🔍)
GCVE (CVE): GCVE-0-2007-1497
GCVE (VulDB): GCVE-100-2979

OVAL: 🔍

X-Force: 33210
SecurityFocus: 23976 - Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability
Secunia: 24492 - Linux Kernel NULL Pointer Dereferences and Security Bypass, Moderately Critical
OSVDB: 33028 - Linux Kernel conntrack IPv6 Packet Reassembly Ruleset Bypass
Vulnerability Center: 15169 - Linux Kernel nf_conntrack Restrictions Bypass, Medium
Vupen: ADV-2007-0944

See also: 🔍

Entryinfo

Created: 03/26/2007 10:55
Updated: 03/15/2021 10:49
Changes: 03/26/2007 10:55 (85), 07/03/2017 09:08 (9), 03/15/2021 10:49 (3)
Complete: 🔍
Cache ID: 216:0A1:103

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