Linux Kernel 2.6.16.9 tc_fill_qdisc null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel 2.6.16.9. This affects the function tc_fill_qdisc. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2011-2525. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.16.9 (Operating System) and classified as critical. Affected by this issue is the function tc_fill_qdisc. 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 confidentiality, integrity, and availability. CVE summarizes:

The qdisc_notify function in net/sched/sch_api.c in the Linux kernel before 2.6.35 does not prevent tc_fill_qdisc function calls referencing builtin (aka CQ_F_BUILTIN) Qdisc structures, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) or possibly have unspecified other impact via a crafted call.

The issue has been introduced in 03/20/2006. The weakness was disclosed 02/01/2012 as Bug 720552 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2011-2525. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 2144 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 56265 (CentOS 5 : kernel (CESA-2011:1065)), 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 165276 (SUSE Security Update for kernel (openSUSE-SU-2012:0206-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (56265), SecurityFocus (BID 48641†) and Vulnerability Center (SBV-32437†). The entries VDB-60830, VDB-58396, VDB-58126 and VDB-57785 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.4
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 56265
Nessus Name: CentOS 5 : kernel (CESA-2011:1065)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 880988
OpenVAS Name: CentOS Update for kernel CESA-2011:1065 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 53b0f08042f04813cd1a7473dacd3edfacb28eb3

Timelineinfo

03/20/2006 🔍
05/10/2010 +1512 days 🔍
05/10/2010 +0 days 🔍
06/15/2011 +400 days 🔍
07/27/2011 +42 days 🔍
02/01/2012 +189 days 🔍
02/01/2012 +0 days 🔍
03/23/2015 +1146 days 🔍
11/29/2021 +2443 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 720552
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-2525 (🔍)
GCVE (CVE): GCVE-0-2011-2525
GCVE (VulDB): GCVE-100-60062

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 48641 - Linux Kernel OOPS 'qdisc_dev()' Dereference Remote Denial of Service Vulnerability
Vulnerability Center: 32437 - Linux kernel 2.6-2.6.34 tc_fill_qdisc() NULL Pointer Dereference Causes Local DoS Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/29/2021 10:01
Changes: 03/23/2015 16:50 (64), 03/28/2017 10:35 (11), 11/29/2021 09:53 (6), 11/29/2021 09:57 (11), 11/29/2021 10:01 (1)
Complete: 🔍
Cache ID: 216:F3C:103

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