Linux Kernel up to 4.16.3 xfs_inode_buf.c xfs_dinode_verify null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.16.3 and classified as problematic. Affected is the function xfs_dinode_verify in the library fs/xfs/libxfs/xfs_inode_buf.c. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2018-10322. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.16.3 (Operating System). Affected is the function xfs_dinode_verify in the library fs/xfs/libxfs/xfs_inode_buf.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

The xfs_dinode_verify function in fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_ilock_attr_map_shared invalid pointer dereference) via a crafted xfs image.

The bug was discovered 04/12/2018. The weakness was disclosed 04/24/2018 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-10322 since 04/24/2018. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111947 (Photon OS 1.0: Linux PHSA-2018-1.0-0169 (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family PhotonOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277309 (Fedora Security Update for kernel (FEDORA-2018-ac3b4c7605)).

A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111947) and SecurityFocus (BID 103960†). The entries VDB-81153, VDB-109511, VDB-113954 and VDB-117073 are pretty similar. 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: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 111947
Nessus Name: Photon OS 1.0: Linux PHSA-2018-1.0-0169 (deprecated)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 57324
OpenVAS Name: Fedora Update for kernel FEDORA-2018-8ce90c8b24
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

04/12/2018 🔍
04/24/2018 +11 days 🔍
04/24/2018 +0 days 🔍
04/24/2018 +0 days 🔍
04/24/2018 +0 days 🔍
04/25/2018 +1 days 🔍
07/31/2018 +97 days 🔍
08/17/2018 +17 days 🔍
03/07/2023 +1663 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2948⛔
Status: Confirmed

CVE: CVE-2018-10322 (🔍)
GCVE (CVE): GCVE-0-2018-10322
GCVE (VulDB): GCVE-100-117072
SecurityFocus: 103960 - Linux Kernel 'fs/xfs/libxfs/xfs_inode_buf.c' Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 04/25/2018 08:48
Updated: 03/07/2023 14:37
Changes: 04/25/2018 08:48 (77), 01/31/2020 11:52 (4), 03/07/2023 14:37 (3)
Complete: 🔍
Cache ID: 216::103

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