CVE-2021-3521

CVE Details

Release Date:

2022-08-22

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.

See more information about CVE-2021-3521 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	4.7	Base Metrics:	AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Access Vector:	Local network	Attack Complexity:	High
Privileges Required:	None	User Interaction:	Required
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (rpm)	ELSA-2022-0368	2022-02-02

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team