Linux Kernel CIFS DFS input validation

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

Summaryinfo

A vulnerability was found in Linux Kernel. It has been declared as problematic. Impacted is an unknown function of the component CIFS DFS. The manipulation results in input validation. This vulnerability is identified as CVE-2011-3363. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (version now known). It has been classified as problematic. Affected is some unknown processing of the component CIFS DFS. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The setup_cifs_sb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.

The weakness was released 09/15/2011 by Shogesh Sharma (Website). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2011-3363 since 08/30/2011. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 69585 (Amazon Linux AMI : kernel (ALAS-2011-26)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 216036 (VMware ESXi and ESX Third Party Libraries Updates (VMSA-2012-0013)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (69827), Tenable (69585), SecurityFocus (BID 49626†), Secunia (SA45936†) and Vulnerability Center (SBV-34077†). Entries connected to this vulnerability are available at VDB-4544, VDB-5260, VDB-5765 and VDB-56641. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69585
Nessus Name: Amazon Linux AMI : kernel (ALAS-2011-26)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 881051
OpenVAS Name: CentOS Update for kernel CESA-2011:1479 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

08/30/2011 🔍
09/14/2011 +15 days 🔍
09/14/2011 +0 days 🔍
09/15/2011 +1 days 🔍
09/15/2011 +0 days 🔍
09/16/2011 +1 days 🔍
12/19/2011 +94 days 🔍
05/24/2012 +157 days 🔍
03/19/2021 +3221 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: github.com
Researcher: Shogesh Sharma
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-3363 (🔍)
GCVE (CVE): GCVE-0-2011-3363
GCVE (VulDB): GCVE-100-4416

OVAL: 🔍
IAVM: 🔍

X-Force: 69827
SecurityFocus: 49626 - Linux Kernel CIFS Mount Local Denial of Service Vulnerability
Secunia: 45936 - Linux Kernel CIFS DFS Denial of Service Vulnerability, Not Critical
Vulnerability Center: 34077 - Linux Kernel Local DoS Caused by an Error when Mounting CIFS Shares with Certain DFS Referrals, Medium

See also: 🔍

Entryinfo

Created: 09/16/2011 02:00
Updated: 03/19/2021 15:14
Changes: 09/16/2011 02:00 (77), 04/08/2017 19:59 (10), 03/19/2021 15:12 (13), 03/19/2021 15:14 (1)
Complete: 🔍
Cache ID: 216:937:103

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