Linux Kernel up to 5.4.91 BPF information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.4.91. It has been classified as problematic. This affects an unknown function of the component BPF Handler. This manipulation causes information disclosure. This vulnerability is handled as CVE-2021-20239. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 5.4.91 (Operating System). Affected by this vulnerability is an unknown code block of the component BPF Handler. 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.

The weakness was released 05/28/2021. The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2021-20239. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 246407 (Linux Distros Unpatched Vulnerability : CVE-2021-20239), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.92 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (246407). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 5.4.4
• 5.4.5
• 5.4.6
• 5.4.7
• 5.4.8
• 5.4.9
• 5.4.10
• 5.4.11
• 5.4.12
• 5.4.13
• 5.4.14
• 5.4.15
• 5.4.16
• 5.4.17
• 5.4.18
• 5.4.19
• 5.4.20
• 5.4.21
• 5.4.22
• 5.4.23
• 5.4.24
• 5.4.25
• 5.4.26
• 5.4.27
• 5.4.28
• 5.4.29
• 5.4.30
• 5.4.31
• 5.4.32
• 5.4.33
• 5.4.34
• 5.4.35
• 5.4.36
• 5.4.37
• 5.4.38
• 5.4.39
• 5.4.40
• 5.4.41
• 5.4.42
• 5.4.43
• 5.4.44
• 5.4.45
• 5.4.46
• 5.4.47
• 5.4.48
• 5.4.49
• 5.4.50
• 5.4.51
• 5.4.52
• 5.4.53
• 5.4.54
• 5.4.55
• 5.4.56
• 5.4.57
• 5.4.58
• 5.4.59
• 5.4.60
• 5.4.61
• 5.4.62
• 5.4.63
• 5.4.64
• 5.4.65
• 5.4.66
• 5.4.67
• 5.4.68
• 5.4.69
• 5.4.70
• 5.4.71
• 5.4.72
• 5.4.73
• 5.4.74
• 5.4.75
• 5.4.76
• 5.4.77
• 5.4.78
• 5.4.79
• 5.4.80
• 5.4.81
• 5.4.82
• 5.4.83
• 5.4.84
• 5.4.85
• 5.4.86
• 5.4.87
• 5.4.88
• 5.4.89
• 5.4.90
• 5.4.91

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

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Exploitinginfo

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Timelineinfo

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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