Linux Kernel up to 4.17.1 fs/jfs/xattr.c ea_get memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 4.17.1. This vulnerability affects the function ea_get of the file fs/jfs/xattr.c. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2018-12233. It is possible to launch the attack on the local host. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.17.1 (Operating System). This vulnerability affects the function ea_get of the file fs/jfs/xattr.c. 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. CVE summarizes:

In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.

The bug was discovered 06/01/2018. The weakness was released 06/12/2018 (Website). The advisory is available at securityfocus.com. This vulnerability was named CVE-2018-12233 since 06/12/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $5k-$25k. 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 171225 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2018:1772-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111165) and SecurityFocus (BID 104452†). Entries connected to this vulnerability are available at VDB-117624, VDB-119423, VDB-119915 and VDB-121903. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.8
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
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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: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

06/01/2018 🔍
06/01/2018 +0 days 🔍
06/12/2018 +10 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
07/18/2018 +36 days 🔍
07/20/2018 +2 days 🔍
03/22/2023 +1706 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3752-1⛔
Status: Not defined

CVE: CVE-2018-12233 (🔍)
GCVE (CVE): GCVE-0-2018-12233
GCVE (VulDB): GCVE-100-119386
SecurityFocus: 104452 - Linux Kernel 'fs/jfs/xattr.c' Local Memory Corruption Vulnerability

See also: 🔍

Entryinfo

Created: 06/12/2018 21:45
Updated: 03/22/2023 15:35
Changes: 06/12/2018 21:45 (76), 02/18/2020 11:49 (5), 03/22/2023 15:35 (4)
Complete: 🔍
Cache ID: 216:95E:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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