VDB-115277 · CVE-2018-7566 · RHSA-2018:2384

Linux Kernel 4.15 /dev/snd/seq memory corruption

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, which was classified as problematic, has been found in Linux Kernel 4.15. This affects an unknown function of the file /dev/snd/seq. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-7566. Local access is required to approach this attack. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 4.15 (Operating System) and classified as problematic. This issue affects an unknown functionality of the file /dev/snd/seq. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Linux kernel 4.15 has a Buffer Overflow via an SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ioctl write operation to /dev/snd/seq by a local user.

The bug was discovered 02/14/2018. The weakness was disclosed 03/30/2018 (Website). The advisory is shared at mailman.alsa-project.org. The identification of this vulnerability is CVE-2018-7566 since 02/28/2018. An attack has to be approached locally. The successful exploitation needs a simple authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 44 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109254 (SUSE SLES12 Security Update : kernel (SUSE-SU-2018:1005-1)), 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 157825 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2018-4250)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109254), SecurityFocus (BID 103605†) and CERT Bund (WID-SEC-2022-0532). The entries VDB-111926 and VDB-114713 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Oracle Linux
Debian Linux
Open Source Linux Kernel
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle VM
NetApp FAS
Avaya Aura Communication Manager
Avaya Aura Session Manager
Avaya Aura Application Enablement Services
Avaya Aura System Manager
Avaya Aura Experience Portal
NetApp AFF

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

4.15

License

open-source

Website

Vendor: https://www.kernel.org/

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: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
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: 109254
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2018:1005-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860857
OpenVAS Name: Ubuntu Update for linux-aws USN-3631-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

02/14/2018 🔍
02/14/2018 +0 days 🔍
02/28/2018 +14 days 🔍
03/30/2018 +30 days 🔍
03/30/2018 +0 days 🔍
03/31/2018 +1 days 🔍
04/20/2018 +20 days 🔍
04/23/2018 +3 days 🔍
09/14/2025 +2701 days 🔍