Linux Kernel fs_context.c smb3_fs_context_parse_param use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel. This affects the function smb3_fs_context_parse_param of the file fs/smb/client/fs_context.c. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2023-5345. The attack requires local access. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (unknown version) and classified as critical. This vulnerability affects the function smb3_fs_context_parse_param of the file fs/smb/client/fs_context.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A use-after-free vulnerability in the Linux kernel's fs/smb/client component can be exploited to achieve local privilege escalation. In case of an error in smb3_fs_context_parse_param, ctx->password was freed but the field was not set to NULL which could lead to double free. We recommend upgrading past commit e6e43b8aa7cd3c3af686caf0c2e11819a886d705.

The weakness was presented 10/03/2023. The advisory is available at git.kernel.org. This vulnerability was named CVE-2023-5345 since 10/02/2023. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/27/2024).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

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Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Google Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

10/02/2023 🔍
10/03/2023 +1 days 🔍
10/03/2023 +0 days 🔍
08/27/2024 +329 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2023-50bd7c9c12
Status: Confirmed

CVE: CVE-2023-5345 (🔍)
GCVE (CVE): GCVE-0-2023-5345
GCVE (VulDB): GCVE-100-241078

Entryinfo

Created: 10/03/2023 07:39
Updated: 08/27/2024 19:09
Changes: 10/03/2023 07:39 (50), 10/23/2023 11:17 (1), 10/23/2023 11:25 (1), 08/27/2024 19:09 (26)
Complete: 🔍
Cache ID: 216::103

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