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CVE-2021-3521 Detail

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

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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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 cwe source acceptance level NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

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