Linux Kernel up to 4.17.10 fs/btrfs/tree-checker.c io_ctl_map_page null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.17.10. This issue affects the function io_ctl_map_page of the file fs/btrfs/tree-checker.c. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2018-14613. The attack requires a local approach. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.17.10 (Operating System). This affects the function io_ctl_map_page of the file fs/btrfs/tree-checker.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. The summary by CVE is:

An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in io_ctl_map_page() when mounting and operating a crafted btrfs image, because of a lack of block group item validation in check_leaf_item in fs/btrfs/tree-checker.c.

The bug was discovered 07/02/2018. The weakness was disclosed 07/27/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2018-14613 since 07/26/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 25 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117988 (openSUSE Security Update : the Linux Kernel (openSUSE-2018-1140)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171812 (OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2018:3071-1)).

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 Tenable (117988) and SecurityFocus (BID 104917†). The entries VDB-115503, VDB-122243, VDB-122244 and VDB-122245 are pretty similar. 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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117988
Nessus Name: openSUSE Security Update : the Linux Kernel (openSUSE-2018-1140)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

07/02/2018 🔍
07/26/2018 +23 days 🔍
07/27/2018 +1 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
07/27/2018 +0 days 🔍
10/08/2018 +73 days 🔍
10/09/2018 +1 days 🔍
04/27/2023 +1661 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3932-1⛔
Status: Confirmed

CVE: CVE-2018-14613 (🔍)
GCVE (CVE): GCVE-0-2018-14613
GCVE (VulDB): GCVE-100-122247
SecurityFocus: 104917 - Linux Kernel Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 07/27/2018 07:58
Updated: 04/27/2023 08:36
Changes: 07/27/2018 07:58 (61), 03/10/2020 16:38 (11), 04/27/2023 08:35 (3), 04/27/2023 08:36 (11)
Complete: 🔍
Cache ID: 216:E6F:103

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

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