Linux Kernel RDMA over Infiniband /dev/infiniband/rdma_cm ib_copy_ah_attr_to_user information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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2.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel. This vulnerability affects the function ib_copy_ah_attr_to_user of the file /dev/infiniband/rdma_cm of the component RDMA over Infiniband. Executing a manipulation can lead to information disclosure. This vulnerability appears as CVE-2021-3923. The attack requires local access. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel (Operating System) (affected version not known). This vulnerability affects the function ib_copy_ah_attr_to_user of the file /dev/infiniband/rdma_cm of the component RDMA over Infiniband. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

The weakness was presented 03/28/2023. The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2021-3923 since 11/03/2021. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

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: 2.8
VulDB Meta Temp Score: 2.8

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

NVD Base Score: 2.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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

11/03/2021 🔍
03/28/2023 +509 days 🔍
03/28/2023 +0 days 🔍
04/15/2023 +18 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2021-3923 (🔍)
GCVE (CVE): GCVE-0-2021-3923
GCVE (VulDB): GCVE-100-224128

Entryinfo

Created: 03/28/2023 07:53
Updated: 04/15/2023 21:12
Changes: 03/28/2023 07:53 (42), 04/15/2023 21:12 (11)
Complete: 🔍
Cache ID: 216::103

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