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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 4.17.10. Affected by this issue is the function write_extent_buffer of the file fs/btrfs/extent-tree.c of the component btrfs Image Handler. The manipulation results in out-of-bounds. This vulnerability is cataloged as CVE-2018-14610. The attack must be initiated from a local position. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.17.10 (Operating System). It has been classified as critical. Affected is the function write_extent_buffer of the file fs/btrfs/extent-tree.c of the component btrfs Image Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the Linux kernel through 4.17.10. There is out-of-bounds access in write_extent_buffer() when mounting and operating a crafted btrfs image, because of a lack of verification that each block group has a corresponding chunk at mount time, within btrfs_read_block_groups in fs/btrfs/extent-tree.c.

The bug was discovered 07/04/2018. The weakness was shared 07/27/2018 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-14610 since 07/26/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 118861 (Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2018-4270)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157862 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2018-4270)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (118861) and SecurityFocus (BID 104917†). The entries VDB-115503, VDB-122243, VDB-122245 and VDB-122246 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.17.0
• 4.17.1
• 4.17.2
• 4.17.3
• 4.17.4
• 4.17.5
• 4.17.6
• 4.17.7
• 4.17.8
• 4.17.9
• 4.17.10

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: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.5
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: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

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: 118861
Nessus Name: Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2018-4270)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/04/2018 🔍
07/26/2018 +21 days 🔍
07/27/2018 +1 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
11/09/2018 +105 days 🔍
11/11/2018 +2 days 🔍
04/27/2023 +1628 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3932-1⛔
Status: Confirmed

CVE: CVE-2018-14610 (🔍)
GCVE (CVE): GCVE-0-2018-14610
GCVE (VulDB): GCVE-100-122244
SecurityFocus: 104917 - Linux Kernel Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/27/2018 07:57
Updated: 04/27/2023 08:24
Changes: 07/27/2018 07:57 (74), 03/10/2020 16:22 (5), 04/27/2023 08:24 (4)
Complete: 🔍
Cache ID: 216:BE6:103

Discussion

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