Linux Kernel 3.11.4 File Permission net/sysctl_net.c net_ctl_permissions input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel 3.11.4. This affects the function net_ctl_permissions of the file net/sysctl_net.c of the component File Permission Handler. This manipulation causes input validation. This vulnerability appears as CVE-2013-4270. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 3.11.4 (Operating System). Affected by this vulnerability is the function net_ctl_permissions of the file net/sysctl_net.c of the component File Permission Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a crafted application.

The weakness was presented 10/05/2013 by Miroslav Vadkerti with Red Hat as Bug 1027752 as confirmed bug report (Website). It is possible to read the advisory at bugzilla.redhat.com. The public release was coordinated in cooperation with Linux. This vulnerability is known as CVE-2013-4270 since 06/12/2013. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 71260 (Ubuntu 13.10 : linux vulnerabilities (USN-2049-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195859 (Ubuntu Security Notification for Linux-lts-raring Vulnerabilities (USN-2020-1)).

Upgrading to version 3.11.5 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. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (89824), Tenable (71260), SecurityFocus (BID 62360†), OSVDB (100932†) and Vulnerability Center (SBV-43313†). See VDB-10113 and VDB-10289 for similar entries. 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: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71260
Nessus Name: Ubuntu 13.10 : linux vulnerabilities (USN-2049-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 841655
OpenVAS Name: Ubuntu Update for linux USN-2049-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 3.11.5
Patch: github.com

Timelineinfo

06/12/2013 🔍
09/12/2013 +92 days 🔍
10/05/2013 +23 days 🔍
10/05/2013 +0 days 🔍
11/07/2013 +33 days 🔍
12/09/2013 +32 days 🔍
12/09/2013 +0 days 🔍
12/16/2013 +7 days 🔍
02/17/2014 +63 days 🔍
06/04/2021 +2664 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1027752
Researcher: Miroslav Vadkerti
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-4270 (🔍)
GCVE (CVE): GCVE-0-2013-4270
GCVE (VulDB): GCVE-100-11503

OVAL: 🔍

X-Force: 89824
SecurityFocus: 62360 - Linux Kernel CVE-2013-4343 Local Denial of Service Vulnerability
OSVDB: 100932
Vulnerability Center: 43313 - Linux Kernel before 3.11.5 Local Bypass Restrictions Vulnerability in net_ctl_permissions(), Low

See also: 🔍

Entryinfo

Created: 12/16/2013 10:21
Updated: 06/04/2021 10:24
Changes: 12/16/2013 10:21 (84), 05/21/2017 14:07 (3), 06/04/2021 10:24 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:0BC:103

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