Linux Kernel EXT4 File System ext4_get_group_info memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel. Affected by this issue is the function ext4_get_group_info of the component EXT4 File System. This manipulation causes memory corruption. This vulnerability appears as CVE-2018-10881. The attack requires local access. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (version now known) and classified as critical. Affected by this vulnerability is the function ext4_get_group_info of the component EXT4 File System. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound access in ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image.

The bug was discovered 06/15/2018. The weakness was presented 07/26/2018 (Website). The advisory is shared at patchwork.ozlabs.org. This vulnerability is known as CVE-2018-10881 since 05/09/2018. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 33 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111165 (Debian DLA-1423-1 : linux-4.9 new package (Spectre)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171490 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2018:2776-1)).

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

The vulnerability is also documented in the databases at Tenable (111165) and SecurityFocus (BID 104901†). See VDB-117624, VDB-119386, VDB-119423 and VDB-119915 for similar entries. 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: 5.0
VulDB Meta Temp Score: 4.9

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

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 4.2
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: 111165
Nessus Name: Debian DLA-1423-1 : linux-4.9 new package (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

05/09/2018 🔍
06/15/2018 +37 days 🔍
07/18/2018 +33 days 🔍
07/20/2018 +2 days 🔍
07/26/2018 +5 days 🔍
07/26/2018 +0 days 🔍
07/26/2018 +0 days 🔍
07/27/2018 +1 days 🔍
04/27/2023 +1735 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2948
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-10881 (🔍)
GCVE (CVE): GCVE-0-2018-10881
GCVE (VulDB): GCVE-100-122233
SecurityFocus: 104901 - Linux Kernel CVE-2018-10881 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/27/2018 07:40
Updated: 04/27/2023 07:53
Changes: 07/27/2018 07:40 (74), 03/10/2020 15:39 (6), 04/27/2023 07:47 (5), 04/27/2023 07:53 (12)
Complete: 🔍
Cache ID: 216::103

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

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