Linux Kernel EXT4 File System out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel. Affected is an unknown function of the component EXT4 File System. The manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2018-10878. The attack needs to be performed locally. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel (Operating System) (the affected version is unknown). This issue affects an unknown code of the component EXT4 File System. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is 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-bounds write and a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4 filesystem image.

The bug was discovered 06/13/2018. The weakness was released 07/26/2018 by ERNE (Website). It is possible to read the advisory at patchwork.ozlabs.org. The identification of this vulnerability is CVE-2018-10878 since 05/09/2018. Attacking locally is a requirement. A simple authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 35 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 256510 (CentOS Security Update for kernel (CESA-2018:3083)).

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 106009†). Entries connected to this vulnerability are available at VDB-116980, VDB-117624, VDB-119386 and VDB-119423. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

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

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 4.8
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / 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 🔍
06/13/2018 +35 days 🔍
07/18/2018 +35 days 🔍
07/20/2018 +2 days 🔍
07/26/2018 +5 days 🔍
07/26/2018 +0 days 🔍
07/27/2018 +1 days 🔍
11/24/2018 +120 days 🔍
04/27/2023 +1615 days 🔍

Sourcesinfo

Vendor: kernel.org

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

CVE: CVE-2018-10878 (🔍)
GCVE (CVE): GCVE-0-2018-10878
GCVE (VulDB): GCVE-100-122231
SecurityFocus: 106009 - Linux Kernel CVE-2018-16862 Local Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 07/27/2018 07:40
Updated: 04/27/2023 07:30
Changes: 07/27/2018 07:40 (73), 03/10/2020 15:33 (7), 04/27/2023 07:24 (5), 04/27/2023 07:30 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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