Linux Kernel up to 4.0 on ARM64 HW PMU perf_event.c access control

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability was found in Linux Kernel up to 4.0 on ARM64 (Operating System). It has been classified as critical. This affects an unknown code block of the file arch/arm64/kernel/perf_event.c of the component HW PMU. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

arch/arm64/kernel/perf_event.c in the Linux kernel before 4.1 on arm64 platforms allows local users to gain privileges or cause a denial of service (invalid pointer dereference) via vectors involving events that are mishandled during a span of multiple HW PMUs.

The weakness was disclosed 10/10/2016 with Google (Website). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2015-8955 since 08/30/2016. The exploitability is told to be easy. An attack has to be approached locally. The requirement for exploitation is a authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 101928 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196854 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3360-1)).

Upgrading to version 4.1 eliminates this vulnerability. A possible mitigation has been published 11 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (101928). The entries 90537, 93975, 93976 and 102372 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101928
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux USN-3360-1
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 4.1
Patch: git.kernel.org

Timelineinfo

08/30/2016 🔍
10/03/2016 +34 days 🔍
10/10/2016 +7 days 🔍
10/10/2016 +0 days 🔍
10/11/2016 +1 days 🔍
07/21/2017 +283 days 🔍
07/24/2017 +3 days 🔍
09/22/2022 +1886 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3360-1
Organization: Google
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8955 (🔍)
SecurityFocus: 93314 - Linux Kernel CVE-2015-8955 Privilege Escalation Vulnerability

See also: 🔍

Entryinfo

Created: 10/11/2016 10:06
Updated: 09/22/2022 17:48
Changes: 10/11/2016 10:06 (70), 05/06/2019 12:05 (14), 09/22/2022 17:41 (5), 09/22/2022 17:48 (1)
Complete: 🔍

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