Linux Kernel up to 4.16.11 fs/ext4/inline.c ext4_read_inline_data use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

A vulnerability was found in Linux Kernel up to 4.16.11 (Operating System). It has been classified as critical. Affected is the function ext4_read_inline_data of the file fs/ext4/inline.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel 4.13 through 4.16.11, ext4_read_inline_data() in fs/ext4/inline.c performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode.

The bug was discovered 05/22/2018. The weakness was released 05/24/2018 by Jann Horn (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-11412 since 05/24/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 111334 (Amazon Linux 2 : kernel (ALAS-2018-1046)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux 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 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (44832), Tenable (111334) and SecurityFocus (BID 104291†). Entries connected to this vulnerability are available at VDB-118953, VDB-120004 and VDB-121521. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.6
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 111334
Nessus Name: Amazon Linux 2 : kernel (ALAS-2018-1046)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

05/22/2018 🔍
05/22/2018 +0 days 🔍
05/24/2018 +1 days 🔍
05/24/2018 +0 days 🔍
05/24/2018 +0 days 🔍
05/25/2018 +1 days 🔍
07/23/2018 +59 days 🔍
07/26/2018 +3 days 🔍
06/18/2024 +2154 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2019:0525⛔
Researcher: Jann Horn
Status: Not defined

CVE: CVE-2018-11412 (🔍)
GCVE (CVE): GCVE-0-2018-11412
GCVE (VulDB): GCVE-100-118176
SecurityFocus: 104291 - Linux kernel CVE-2018-11412 Out-of-Bounds Security Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/25/2018 08:59 AM
Updated: 06/18/2024 11:59 AM
Changes: 05/25/2018 08:59 AM (77), 02/08/2020 03:47 PM (9), 03/17/2023 08:30 AM (4), 06/18/2024 11:59 AM (14)
Complete: 🔍
Cache ID: 18:DCB:40

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