Linux Kernel up to 4.8.11 cgroup Hang input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 4.8.11. This impacts an unknown function of the component cgroup. Executing a manipulation can lead to input validation (Hang). This vulnerability is registered as CVE-2016-9191. The attack needs to be launched locally. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.8.11 (Operating System). It has been declared as problematic. This vulnerability affects an unknown functionality of the component cgroup. The manipulation with an unknown input leads to a input validation vulnerability (Hang). 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 availability. CVE summarizes:

The cgroup offline implementation in the Linux kernel through 4.8.11 mishandles certain drain operations, which allows local users to cause a denial of service (system hang) by leveraging access to a container environment for executing a crafted application, as demonstrated by trinity.

The bug was discovered 11/07/2016. The weakness was published 11/28/2016 (Website). The advisory is available at openwall.com. This vulnerability was named CVE-2016-9191 since 11/05/2016. The exploitation appears to be easy. Local access is required to approach this attack. The successful exploitation needs a single authentication. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 20 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97357 (Debian DSA-3791-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196704 (Ubuntu Security Notification for Linux, Linux-snapdragon Vulnerabilities (USN-3208-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97357) and SecurityFocus (BID 94129†). Similar entries are available at VDB-95265, VDB-96557, VDB-96563 and VDB-96952. Once again VulDB remains the best 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: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Hang
Class: Input validation / Hang
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: 97357
Nessus Name: Debian DSA-3791-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703791
OpenVAS Name: Debian Security Advisory DSA 3791-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

11/05/2016 🔍
11/05/2016 +0 days 🔍
11/07/2016 +2 days 🔍
11/27/2016 +20 days 🔍
11/28/2016 +1 days 🔍
11/28/2016 +0 days 🔍
02/22/2017 +86 days 🔍
02/24/2017 +2 days 🔍
10/04/2022 +2048 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 93362fa47fe98b62e4a34ab408c4a418432e7939
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9191 (🔍)
GCVE (CVE): GCVE-0-2016-9191
GCVE (VulDB): GCVE-100-93850

OVAL: 🔍

SecurityFocus: 94129 - Linux Kernel CVE-2016-9191 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 11/28/2016 09:32
Updated: 10/04/2022 15:08
Changes: 11/28/2016 09:32 (69), 06/11/2019 10:34 (15), 10/04/2022 15:08 (5)
Complete: 🔍
Cache ID: 216:8CE:103

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