Linux Kernel fs/ext4/xattr.c ext4_xattr_set_entry memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel. This issue affects the function ext4_xattr_set_entry of the file fs/ext4/xattr.c. Performing a manipulation results in memory corruption. This vulnerability is identified as CVE-2018-10840. The attack may be carried out on the physical device. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel (Operating System) (affected version unknown). This affects the function ext4_xattr_set_entry of the file fs/ext4/xattr.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. The summary by CVE is:

Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.

The bug was discovered 07/19/2018. The weakness was released 07/16/2018 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2018-10840 since 05/09/2018. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 110210 (Fedora 27 : kernel (2018-9d0e4e40b5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197240 (Ubuntu Security Notification for Linux, Linux-aws, Linux-gcp, Linux-kvm, Linux-raspi2 Vulnerabilities (USN-3752-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110210) and SecurityFocus (BID 104858†). Entries connected to this vulnerability are available at VDB-118176, VDB-118953 and VDB-120004. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.6
NVD Vector: 🔍

CNA Base Score: 5.2
CNA Vector (Red Hat, Inc.): 🔍

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: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110210
Nessus Name: Fedora 27 : kernel (2018-9d0e4e40b5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 830383
OpenVAS Name: Fedora Update for kernel FEDORA-2018-537c8312fc
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/11/2018 🔍
05/09/2018 +28 days 🔍
05/29/2018 +20 days 🔍
05/30/2018 +1 days 🔍
07/16/2018 +46 days 🔍
07/16/2018 +0 days 🔍
07/17/2018 +1 days 🔍
07/19/2018 +2 days 🔍
04/09/2023 +1725 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2018-9d0e4e40b5
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-10840 (🔍)
GCVE (CVE): GCVE-0-2018-10840
GCVE (VulDB): GCVE-100-121521
SecurityFocus: 104858 - Linux Kernel CVE-2018-10840 Local Heap Based Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 07/17/2018 09:48
Updated: 04/09/2023 12:08
Changes: 07/17/2018 09:48 (75), 03/05/2020 15:20 (5), 04/09/2023 11:54 (3), 04/09/2023 12:01 (10), 04/09/2023 12:08 (1)
Complete: 🔍
Cache ID: 216:444:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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