Linux Kernel up to 4.9.9 SELinux Attribute /proc/pid/attr setsockopt calculation

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

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 4.9.9. This affects the function setsockopt of the file /proc/pid/attr of the component SELinux Attribute Handler. The manipulation leads to calculation. This vulnerability is listed as CVE-2017-2618. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.9.9 (Operating System). It has been rated as critical. This issue affects the function setsockopt of the file /proc/pid/attr of the component SELinux Attribute Handler. The manipulation with an unknown input leads to a calculation vulnerability. Using CWE to declare the problem leads to CWE-682. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. Impacted is availability. The summary by CVE is:

A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.

The bug was discovered 04/19/2017. The weakness was presented 07/27/2018 by Paul with Red Hat (Website). The advisory is shared at marc.info. The identification of this vulnerability is CVE-2017-2618 since 11/30/2016. An attack has to be approached locally. A simple authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 99938 (EulerOS 2.0 SP2 : kernel (EulerOS-SA-2017-1072)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175973 (Debian Security Update for Linux (DSA 3791-1)).

Upgrading to version 4.9.10 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 (99938) and SecurityFocus (BID 96272†). See VDB-94694, VDB-95265, VDB-96557 and VDB-96952 for similar entries. Several companies clearly confirm that VulDB is the primary source for best 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: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Calculation
CWE: CWE-682
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: 99938
Nessus Name: EulerOS 2.0 SP2 : kernel (EulerOS-SA-2017-1072)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for kernel CESA-2017:0933 centos7
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 4.9.10
Patch: git.kernel.org

Timelineinfo

11/30/2016 🔍
02/16/2017 +77 days 🔍
04/03/2017 +45 days 🔍
04/19/2017 +16 days 🔍
05/03/2017 +14 days 🔍
07/27/2018 +449 days 🔍
07/27/2018 +0 days 🔍
07/28/2018 +1 days 🔍
04/27/2023 +1734 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2017:0931
Researcher: Paul
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-2618 (🔍)
GCVE (CVE): GCVE-0-2017-2618
GCVE (VulDB): GCVE-100-122273

OVAL: 🔍

SecurityFocus: 96272 - Linux Kernel 'selinux/hooks.c' Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/28/2018 07:33
Updated: 04/27/2023 11:07
Changes: 07/28/2018 07:33 (81), 03/10/2020 20:25 (5), 04/27/2023 11:01 (5), 04/27/2023 11:07 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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