Linux Kernel up to 3.x intel_early.c get_matching_model_microcode memory corruption

CVSS Meta Temp Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 3.x. Affected by this vulnerability is the function get_matching_model_microcode of the file arch/x86/kernel/cpu/microcode/intel_early.c. The manipulation results in memory corruption. This vulnerability is known as CVE-2015-2666. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.x (Operating System). It has been classified as critical. Affected is the function get_matching_model_microcode of the file arch/x86/kernel/cpu/microcode/intel_early.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.

The weakness was published 05/27/2015 (Website). The advisory is available at kernel.org. This vulnerability is traded as CVE-2015-2666 since 03/20/2015. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 83178 (Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2587-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123847 (CentOS Security Update for kernel Security Update (CESA-2015:1534)).

Upgrading to version 4.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (83178), SecurityFocus (BID 73183†), SecurityTracker (ID 1032414†) and Vulnerability Center (SBV-50324†). Similar entries are available at VDB-93980, VDB-94739, VDB-98332 and VDB-104864. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 83178
Nessus Name: Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2587-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 800909
OpenVAS Name: Fedora Update for kernel FEDORA-2015-5024
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 4.0
Patch: f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4

Timelineinfo

01/01/2012 🔍
03/20/2015 +1174 days 🔍
05/01/2015 +42 days 🔍
05/27/2015 +26 days 🔍
05/27/2015 +0 days 🔍
05/28/2015 +1 days 🔍
05/28/2015 +0 days 🔍
05/28/2015 +0 days 🔍
05/19/2022 +2548 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2587-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2666 (🔍)
GCVE (CVE): GCVE-0-2015-2666
GCVE (VulDB): GCVE-100-75570
SecurityFocus: 73183
SecurityTracker: 1032414 - Linux Kernel Buffer Overflow in get_matching_model_microcode() Lets Local Users Gain Elevated Privileges
Vulnerability Center: 50324 - Linux kernel before 4.0 Local Privilege Escalation via a Crafted Microcode Header, Medium

See also: 🔍

Entryinfo

Created: 05/28/2015 10:17
Updated: 05/19/2022 13:40
Changes: 05/28/2015 10:17 (72), 05/17/2018 23:24 (5), 05/19/2022 13:28 (4), 05/19/2022 13:33 (1), 05/19/2022 13:40 (2)
Complete: 🔍
Cache ID: 216:600:103

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