Linux Kernel up to 4.9.3 arch/x86/kvm/emulate.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.9.3. Impacted is an unknown function of the file arch/x86/kvm/emulate.c. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2017-2584. Local access is required to approach this attack. No exploit exists. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.9.3 (Operating System) and classified as problematic. Affected by this issue is some unknown functionality of the file arch/x86/kvm/emulate.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality. CVE summarizes:

arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.

The bug was discovered 01/13/2017. The weakness was disclosed 01/15/2017 by Prasad J Pandit (Website). The advisory is available at spinics.net. This vulnerability is handled as CVE-2017-2584 since 12/01/2016. Local access is required to approach this attack. A simple authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97274 (openSUSE Security Update : the Linux Kernel (openSUSE-2017-245)), 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 169712 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2017:0464-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at spinics.net. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97274), SecurityFocus (BID 95430†) and SecurityTracker (ID 1037603†). The entries VDB-96556, VDB-96566 and VDB-96567 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: 97274
Nessus Name: openSUSE Security Update : the Linux Kernel (openSUSE-2017-245)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703791
OpenVAS Name: Debian Security Advisory DSA 3791-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: spinics.net

Timelineinfo

12/01/2016 🔍
01/13/2017 +43 days 🔍
01/13/2017 +0 days 🔍
01/14/2017 +1 days 🔍
01/15/2017 +1 days 🔍
01/15/2017 +0 days 🔍
01/17/2017 +2 days 🔍
02/13/2017 +27 days 🔍
02/21/2017 +8 days 🔍
10/28/2022 +2075 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 129a72a0d3c8e139a04512325384fe5ac119e74d
Researcher: Prasad J Pandit
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-2584 (🔍)
GCVE (CVE): GCVE-0-2017-2584
GCVE (VulDB): GCVE-100-95342

OVAL: 🔍

SecurityFocus: 95430 - Linux Kernel CVE-2017-2584 Denial of Service Vulnerability
OSVDB: - CVE-2017-2584 - Linux - Use-After-Free Issue
SecurityTracker: 1037603

See also: 🔍

Entryinfo

Created: 01/15/2017 10:39
Updated: 10/28/2022 19:27
Changes: 01/15/2017 10:39 (76), 07/25/2020 07:57 (6), 10/28/2022 19:21 (2), 10/28/2022 19:27 (12)
Complete: 🔍
Cache ID: 216:B07:103

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