Linux Kernel up to 4.10.6 fs/crypto/ use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.10.6 and classified as critical. This vulnerability affects unknown code of the file fs/crypto/. The manipulation leads to use after free. This vulnerability was named CVE-2017-7374. Attacking locally is a requirement. There is no exploit available. It is recommended to apply a patch to fix this issue. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.10.6 (Operating System). This affects some unknown processing of the file fs/crypto/. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Use-after-free vulnerability in fs/crypto/ in the Linux kernel before 4.10.7 allows local users to cause a denial of service (NULL pointer dereference) or possibly gain privileges by revoking keyring keys being used for ext4, f2fs, or ubifs encryption, causing cryptographic transform objects to be freed prematurely.

The bug was discovered 03/31/2017. The weakness was disclosed 03/31/2017 as confirmed git commit (GIT Repository). It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-7374 since 03/31/2017. Attacking locally is a requirement. Required for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 99657 (Ubuntu 16.04 LTS : linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities (USN-3265-1)), 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 196761 (Ubuntu Security Notification for Linux, Linux-aws, Linux-gke, Linux-raspi2, Linux-snapdragon Vulnerabilities (USN-3265-1)).

Upgrading to version 4.10.7 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99657) and SecurityFocus (BID 97308†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 99657
Nessus Name: Ubuntu 16.04 LTS : linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities (USN-3265-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850584
OpenVAS Name: SuSE Update for the openSUSE-SU-2017:1140-1 (the)
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: 🔍

Upgrade: Kernel 4.10.7
Patch: git.kernel.org

Timelineinfo

03/31/2017 🔍
03/31/2017 +0 days 🔍
03/31/2017 +0 days 🔍
03/31/2017 +0 days 🔍
03/31/2017 +0 days 🔍
04/01/2017 +1 days 🔍
04/24/2017 +23 days 🔍
04/25/2017 +1 days 🔍
11/24/2022 +2039 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3265-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7374 (🔍)
GCVE (CVE): GCVE-0-2017-7374
GCVE (VulDB): GCVE-100-99147
SecurityFocus: 97308 - Linux Kernel CVE-2017-7374 Local Denial of Service Vulnerability
OSVDB: - CVE-2017-7374 - Linux - Use-After-Free Issue

Entryinfo

Created: 04/01/2017 10:03
Updated: 11/24/2022 11:01
Changes: 04/01/2017 10:03 (85), 11/24/2022 10:56 (4), 11/24/2022 11:01 (1)
Complete: 🔍
Cache ID: 216:E6E:103