Linux Kernel up to 6.3.2 lib/crc16.c ext4_group_desc_csum out-of-bounds

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

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 6.3.2. Affected is the function ext4_group_desc_csum in the library lib/crc16.c. The manipulation results in out-of-bounds. This vulnerability is cataloged as CVE-2023-34256. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.3.2 (Operating System). Affected is the function ext4_group_desc_csum in the library lib/crc16.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. CVE summarizes:

An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset.

The weakness was shared 06/01/2023. The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2023-34256 since 05/31/2023. Technical details are known, but there is no available exploit.

Upgrading to version 6.3.3 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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 6.3.3
Patch: git.kernel.org

Timelineinfo

05/31/2023 🔍
06/01/2023 +1 days 🔍
06/01/2023 +0 days 🔍
08/02/2024 +428 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-34256 (🔍)
GCVE (CVE): GCVE-0-2023-34256
GCVE (VulDB): GCVE-100-230394

Entryinfo

Created: 06/01/2023 06:05
Updated: 08/02/2024 18:37
Changes: 06/01/2023 06:05 (44), 06/25/2023 11:05 (11), 08/02/2024 18:37 (15)
Complete: 🔍
Cache ID: 216::103

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