NVD

CVE-2021-20257 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

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

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: 6.5 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 2.1 LOW

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

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1930087	Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html	Mailing List Patch Vendor Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0003/	Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/25/2	Mailing List Patch Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-835	Loop with Unreachable Exit Condition ('Infinite Loop')	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Modified Analysis by NIST 5/12/2022 4:47:31 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		AND OR cpe:2.3:a:redhat:codeready_linux_builder:-::::::: OR cpe:2.3:o:redhat:enterprise_linux:8.0:::::::* cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:::::::* cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:::::::*
Added	CPE Configuration		OR cpe:2.3:a:redhat:openstack_platform:10.0::::::: cpe:2.3:a:redhat:openstack_platform:13.0::::::: cpe:2.3:o:redhat:enterprise_linux:6.0::::::: cpe:2.3:o:redhat:enterprise_linux:8.0::::::: cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::* cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0::::::: cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:::::::
Added	CPE Configuration		OR cpe:2.3:o:fedoraproject:fedora:33:::::::
Changed	Reference Type	https://security.netapp.com/advisory/ntap-20220425-0003/ No Types Assigned	https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory

Initial Analysis by NIST 3/22/2022 1:06:43 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:qemu:qemu::::::::* versions up to (excluding) 6.2.0
Added	CVSS V2		NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P)
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Added	CWE		NIST CWE-835
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=1930087 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking, Patch, Third Party Advisory
Changed	Reference Type	https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 No Types Assigned	https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch, Third Party Advisory
Changed	Reference Type	https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html No Types Assigned	https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List, Patch, Vendor Advisory
Changed	Reference Type	https://www.openwall.com/lists/oss-security/2021/02/25/2 No Types Assigned	https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List, Patch, Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-20257
NVD Published Date:
03/16/2022
NVD Last Modified:
02/12/2023
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-20257 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by Red Hat, Inc. 5/14/2024 4:03:15 AM

CVE Modified by Red Hat, Inc. 2/12/2023 5:15:17 PM

CVE Modified by Red Hat, Inc. 2/02/2023 4:20:57 PM

Modified Analysis by NIST 9/23/2022 11:20:01 AM

CVE Modified by Red Hat, Inc. 9/05/2022 2:15:14 AM

CVE Modified by Red Hat, Inc. 8/15/2022 7:15:22 AM

Modified Analysis by NIST 5/12/2022 4:47:31 PM

CVE Modified by Red Hat, Inc. 4/25/2022 5:15:56 PM

Initial Analysis by NIST 3/22/2022 1:06:43 PM

Quick Info