Linux Kernel up to 3.2.50 User Namespace kernel/user_namespace.c resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 3.2.50. Affected is an unknown function of the file kernel/user_namespace.c of the component User Namespace Handler. The manipulation leads to resource management. This vulnerability is traded as CVE-2013-4205. Furthermore, there is an exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.2.50 (Operating System). It has been rated as problematic. This issue affects an unknown functionality of the file kernel/user_namespace.c of the component User Namespace Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

Memory leak in the unshare_userns function in kernel/user_namespace.c in the Linux kernel before 3.10.6 allows local users to cause a denial of service (memory consumption) via an invalid CLONE_NEWUSER unshare call.

The weakness was shared 08/05/2013 by spender as confirmed mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2013-4205 since 06/12/2013. Attacking locally is a requirement. The successful exploitation needs a simple authentication. Technical details as well as a private exploit are known.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 70194 (Ubuntu 13.04 : linux vulnerabilities (USN-1974-1)), 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 195922 (Ubuntu Security Notification for Linux-lts-raring Vulnerabilities (USN-1971-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (86269), Tenable (70194), SecurityFocus (BID 61636†), OSVDB (96069†) and Secunia (SA54395†). 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: 5.5
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70194
Nessus Name: Ubuntu 13.04 : linux vulnerabilities (USN-1974-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 841580
OpenVAS Name: Ubuntu Update for linux-lts-raring USN-1971-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

06/12/2013 🔍
08/05/2013 +54 days 🔍
08/05/2013 +0 days 🔍
08/06/2013 +1 days 🔍
08/06/2013 +0 days 🔍
08/09/2013 +3 days 🔍
08/12/2013 +3 days 🔍
08/24/2013 +12 days 🔍
09/28/2013 +35 days 🔍
04/24/2014 +208 days 🔍
05/21/2021 +2584 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: spender
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-4205 (🔍)
GCVE (CVE): GCVE-0-2013-4205
GCVE (VulDB): GCVE-100-9899

OVAL: 🔍

X-Force: 86269
SecurityFocus: 61636 - Linux Kernel CVE-2013-4205 Local Denial of Service Vulnerability
Secunia: 54395 - Linux Kernel "unshare_userns()" Denial of Service Vulnerability, Not Critical
OSVDB: 96069
Vulnerability Center: 44244 - Linux Kernel Before 3.10.6 Local DoS Vulnerability via an Invalid Call, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/12/2013 15:07
Updated: 05/21/2021 09:53
Changes: 08/12/2013 15:07 (84), 05/26/2017 03:51 (4), 05/21/2021 09:53 (3)
Complete: 🔍
Committer:
Cache ID: 216::103

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