NVD

CVE-2021-20194 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 7.8 HIGH

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.6 MEDIUM

Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1912683	Issue Tracking Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20210326-0003/	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	NIST
CWE-20	Improper Input Validation	Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

CVE Modified by Red Hat, Inc. 2/12/2023 5:15:16 PM

Action	Type	Old Value	New Value
Removed	CVSS V3.1	Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	CWE		Red Hat, Inc. CWE-20
Changed	Description	A flaw buffer overflow in the Linux kernel BPF subsystem was found in the way user running BPF script calling getsockopt. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.	Record truncated, showing 500 of 520 characters. View Entire Change Record There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly pr
Removed	Reference	https://access.redhat.com/errata/RHSA-2021:4140 [No Types Assigned]
Removed	Reference	https://access.redhat.com/errata/RHSA-2021:4356 [No Types Assigned]
Removed	Reference	https://access.redhat.com/security/cve/CVE-2021-20194 [No Types Assigned]

CVE Modified by Red Hat, Inc. 2/02/2023 4:20:49 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		Red Hat, Inc. AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Removed	CWE	Red Hat, Inc. CWE-20
Removed	CWE Reason	CWE-20 / More specific CWE option available
Changed	Description	Record truncated, showing 500 of 520 characters. View Entire Change Record There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly pr	A flaw buffer overflow in the Linux kernel BPF subsystem was found in the way user running BPF script calling getsockopt. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.
Added	Reference		https://access.redhat.com/errata/RHSA-2021:4140 [No Types Assigned]
Added	Reference		https://access.redhat.com/errata/RHSA-2021:4356 [No Types Assigned]
Added	Reference		https://access.redhat.com/security/cve/CVE-2021-20194 [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2021-20194
NVD Published Date:
02/23/2021
NVD Last Modified:
02/12/2023
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-20194 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

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Change History

CVE Modified by Red Hat, Inc. 5/14/2024 4:02:52 AM

CVE Modified by Red Hat, Inc. 2/12/2023 5:15:16 PM

CVE Modified by Red Hat, Inc. 2/02/2023 4:20:49 PM

Reanalysis by NIST 8/05/2022 2:07:08 PM

Modified Analysis by NIST 3/31/2021 8:29:39 AM

CVE Modified by Red Hat, Inc. 3/26/2021 7:15:12 AM

Initial Analysis by NIST 2/26/2021 10:08:48 PM

Quick Info