Linux Kernel up to 4.4 on s390 Fork mmu_context.h input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.4 on s390 and classified as problematic. This affects an unknown part of the file arch/s390/include/asm/mmu_context.h of the component Fork. Performing a manipulation results in input validation. This vulnerability was named CVE-2016-2143. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.4 on s390 (Operating System). This affects an unknown part of the file arch/s390/include/asm/mmu_context.h of the component Fork. 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 confidentiality, integrity, and availability. The summary by CVE is:

The fork implementation in the Linux kernel before 4.5 on s390 platforms mishandles the case of four page-table levels, which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted application, related to arch/s390/include/asm/mmu_context.h and arch/s390/include/asm/pgalloc.h.

The weakness was presented 04/27/2016 (Website). The advisory is shared at security-tracker.debian.org. This vulnerability is uniquely identified as CVE-2016-2143 since 01/28/2016. An attack has to be approached locally. A authentication is necessary for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 90531 (SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:1019-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157314 (Oracle Enterprise Linux Security Update for kernel (ELSA-2016-2574)-Deprecated).

Upgrading to version 4.5 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (90531) and SecurityFocus (BID 76005†). See VDB-77497, VDB-79923, VDB-82951 and VDB-82963 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90531
Nessus Name: SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:1019-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for kernel CESA-2016:2766 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.5
Patch: git.kernel.org

Timelineinfo

01/28/2016 🔍
04/12/2016 +74 days 🔍
04/15/2016 +3 days 🔍
04/27/2016 +12 days 🔍
04/27/2016 +0 days 🔍
04/28/2016 +1 days 🔍
07/27/2022 +2281 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 3446c13b268af86391d06611327006b059b8bab1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2143 (🔍)
GCVE (CVE): GCVE-0-2016-2143
GCVE (VulDB): GCVE-100-82953

OVAL: 🔍

SecurityFocus: 76005

See also: 🔍

Entryinfo

Created: 04/28/2016 10:23
Updated: 07/27/2022 07:56
Changes: 04/28/2016 10:23 (62), 10/29/2018 05:48 (17), 07/27/2022 07:49 (4), 07/27/2022 07:56 (1)
Complete: 🔍
Cache ID: 216:D86:103

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