Linux Kernel up to 6.3 ksmbd fs/ksmbd/smb2pdu.c smb2_get_info_filesystem null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.3. It has been classified as problematic. Affected by this vulnerability is the function smb2_get_info_filesystem of the file fs/ksmbd/smb2pdu.c of the component ksmbd. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2023-32248. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.3 (Operating System). Affected by this vulnerability is the function smb2_get_info_filesystem of the file fs/ksmbd/smb2pdu.c of the component ksmbd. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was shared 05/18/2023. It is possible to read the advisory at zerodayinitiative.com. This vulnerability is known as CVE-2023-32248 since 05/05/2023. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.4-rc1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3ac00a2ab69b34189942afa9e862d5170cdcb018 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.4-rc1
Patch: 3ac00a2ab69b34189942afa9e862d5170cdcb018

Timelineinfo

05/05/2023 🔍
05/18/2023 +13 days 🔍
05/18/2023 +0 days 🔍
05/18/2023 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: zerodayinitiative.com
Status: Confirmed

CVE: CVE-2023-32248 (🔍)
GCVE (CVE): GCVE-0-2023-32248
GCVE (VulDB): GCVE-100-229339

Entryinfo

Created: 05/18/2023 09:29
Changes: 05/18/2023 09:29 (45)
Complete: 🔍
Cache ID: 216::103

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