NVD

CVE-2021-3521 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 flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and public keys from trusted sources.

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: 4.7 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink	Resource
https://access.redhat.com/security/cve/CVE-2021-3521	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1941098	Issue Tracking Patch Third Party Advisory
https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8	Patch Third Party Advisory
https://github.com/rpm-software-management/rpm/pull/1795/	Patch Third Party Advisory
https://security.gentoo.org/glsa/202210-22	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-347	Improper Verification of Cryptographic Signature	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

7 change records found show changes

CVE Modified by Red Hat, Inc. 2/12/2023 6:41:15 PM

Action	Type	Old Value	New Value
Removed	CVSS V3.1	Red Hat, Inc. AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
Added	CWE		Red Hat, Inc. CWE-347
Changed	Description	There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature."[1] RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. 1. https://tools.ietf.org/html/rfc4880#section-5.2.1	Record truncated, showing 500 of 653 characters. View Entire Change Record There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository
Removed	Reference	https://access.redhat.com/errata/RHSA-2022:0254 [No Types Assigned]
Removed	Reference	https://access.redhat.com/errata/RHSA-2022:0368 [No Types Assigned]
Removed	Reference	https://access.redhat.com/errata/RHSA-2022:0634 [No Types Assigned]

CVE Modified by Red Hat, Inc. 2/02/2023 4:21:06 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		Red Hat, Inc. AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
Removed	CWE	Red Hat, Inc. CWE-347
Changed	Description	Record truncated, showing 500 of 653 characters. View Entire Change Record There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository	There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature."[1] RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. 1. https://tools.ietf.org/html/rfc4880#section-5.2.1
Added	Reference		https://access.redhat.com/errata/RHSA-2022:0254 [No Types Assigned]
Added	Reference		https://access.redhat.com/errata/RHSA-2022:0368 [No Types Assigned]
Added	Reference		https://access.redhat.com/errata/RHSA-2022:0634 [No Types Assigned]

Initial Analysis by NIST 8/26/2022 11:36:43 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:rpm:rpm::::::::* versions up to (excluding) 4.18.0
Added	CVSS V3.1		NIST AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Added	CWE		NIST CWE-347
Changed	Reference Type	https://access.redhat.com/security/cve/CVE-2021-3521 No Types Assigned	https://access.redhat.com/security/cve/CVE-2021-3521 Third Party Advisory
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=1941098 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=1941098 Issue Tracking, Patch, Third Party Advisory
Changed	Reference Type	https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8 No Types Assigned	https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8 Patch, Third Party Advisory
Changed	Reference Type	https://github.com/rpm-software-management/rpm/pull/1795/ No Types Assigned	https://github.com/rpm-software-management/rpm/pull/1795/ Patch, Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-3521
NVD Published Date:
08/22/2022
NVD Last Modified:
02/12/2023
Source:
Red Hat, Inc.

You are viewing this page in an unauthorized frame window.

Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-3521 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 5:24:38 AM

CVE Modified by Red Hat, Inc. 2/12/2023 6:41:15 PM

CVE Modified by Red Hat, Inc. 2/02/2023 4:21:06 PM

Modified Analysis by NIST 12/02/2022 8:25:09 PM

CVE Modified by Red Hat, Inc. 10/31/2022 12:15:17 AM

Reanalysis by NIST 9/12/2022 10:12:36 AM

Initial Analysis by NIST 8/26/2022 11:36:43 AM

Quick Info