Linux Kernel up to 4.4.0 on PowerPC TM Suspend Mode process.c tm_reclaim_thread access control

CVSS Meta Temp Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 4.4.0 on PowerPC. This affects the function tm_reclaim_thread of the file arch/powerpc/kernel/process.c of the component TM Suspend Mode. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2015-8845. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 4.4.0 on PowerPC (Operating System) and classified as critical. This vulnerability affects the function tm_reclaim_thread of the file arch/powerpc/kernel/process.c of the component TM Suspend Mode. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The tm_reclaim_thread function in arch/powerpc/kernel/process.c in the Linux kernel before 4.4.1 on powerpc platforms does not ensure that TM suspend mode exists before proceeding with a tm_reclaim call, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.

The weakness was presented 04/27/2016 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2015-8845 since 04/13/2016. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 95321 (CentOS 7 : kernel (CESA-2016:2574)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169014 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2016:1937-1)).

Upgrading to version 4.4.1 eliminates this vulnerability. A possible mitigation has been published 8 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (95321). See VDB-80182, VDB-82947, VDB-83132 and VDB-88358 for similar entries. Once again VulDB remains the best source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
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: 95321
Nessus Name: CentOS 7 : kernel (CESA-2016:2574)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for kernel RHSA-2016:2574-02
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.4.1
Patch: git.kernel.org

Timelineinfo

04/13/2016 🔍
04/27/2016 +14 days 🔍
04/27/2016 +0 days 🔍
04/28/2016 +1 days 🔍
11/24/2016 +210 days 🔍
11/27/2016 +3 days 🔍
07/27/2022 +2067 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2016:2574
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8845 (🔍)
GCVE (CVE): GCVE-0-2015-8845
GCVE (VulDB): GCVE-100-82948
SecurityTracker: 1035594

See also: 🔍

Entryinfo

Created: 04/28/2016 10:22
Updated: 07/27/2022 07:10
Changes: 04/28/2016 10:22 (69), 10/29/2018 05:45 (11), 07/27/2022 06:48 (6), 07/27/2022 06:57 (1), 07/27/2022 07:10 (1)
Complete: 🔍
Cache ID: 216::103

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