Linux Kernel up to 2.x ip_conntrack_proto_sctp.c sctp_new null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 2.x (Operating System). Affected by this issue is the function sctp_new of the file ip_conntrack_proto_sctp.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

The sctp_new function in (1) ip_conntrack_proto_sctp.c and (2) nf_conntrack_proto_sctp.c in Netfilter in Linux kernel 2.6 before 2.6.20.13, and 2.6.21.x before 2.6.21.4, allows remote attackers to cause a denial of service by causing certain invalid states that trigger a NULL pointer dereference.

The bug was discovered 06/07/2007. The weakness was shared 06/08/2007 (Website). The advisory is shared for download at vupen.com. This vulnerability is handled as CVE-2007-2876 since 05/29/2007. The exploitation is known to be easy. The attack needs to be initiated within the local network. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 25483 (Linux Kernel Netfilter *_conntrack_proto_sctp.c sctp_new Function Unknown Chunk Type Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Denial of Service and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156118 (Oracle Enterprise Linux Update for Kernel (ELSA-2007-0488)).

Upgrading to version 2.6_test9_cvs eliminates this vulnerability. Attack attempts may be identified with Snort ID 16009. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12530.

The vulnerability is also documented in the databases at X-Force (34777) and Tenable (25483). The entries 2751, 2753, 2756 and 35049 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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Nessus ID: 25483
Nessus Name: Linux Kernel Netfilter *_conntrack_proto_sctp.c sctp_new Function Unknown Chunk Type Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 58528
OpenVAS Name: Debian Security Advisory DSA 1356-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 2.6_test9_cvs

Snort ID: 16009
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
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Fortigate IPS: 🔍

Timelineinfo

05/29/2007 🔍
06/07/2007 +9 days 🔍
06/08/2007 +1 days 🔍
06/08/2007 +0 days 🔍
06/08/2007 +0 days 🔍
06/08/2007 +0 days 🔍
06/11/2007 +2 days 🔍
06/11/2007 +0 days 🔍
06/12/2007 +1 days 🔍
06/19/2007 +7 days 🔍
03/15/2015 +2826 days 🔍
07/20/2019 +1588 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: vupen.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-2876 (🔍)
OVAL: 🔍

X-Force: 34777
Vulnerability Center: 15386 - Linux Kernel Netfilter Remote Denial of Service by Triggering a NULL Pointer Dereference, High
SecurityFocus: 24376 - Linux Kernel SCTP Connection Denial Of Service Vulnerability
Secunia: 25594
OSVDB: 37112 - Linux Kernel Netfilter *_conntrack_proto_sctp.c sctp_new Function Unknown Chunk Type Remote DoS
Vupen: ADV-2007-2105

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Entryinfo

Created: 03/15/2015 15:58
Updated: 07/20/2019 17:25
Changes: 03/15/2015 15:58 (91), 07/20/2019 17:25 (1)
Complete: 🔍

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